查看mysql正在执行的SQL语句，使用profile分析SQL执行状态

http://qq85609655.iteye.com/blog/2113960

 

1)我们先通过status命令查看Mysql运行状态

mysql> status;

--------------

mysql Ver 14.14 Distrib 5.1.73, for redhat-linux-gnu (x86_64) using readline 5.1

Connection id: 113752

Current database: information_schema

Current user: push_user@localhost

SSL: Not in use

扫描二维码关注公众号，回复： 1702696 查看本文章

Current pager: stdout

Using outfile: ''

Using delimiter: ;

Server version: 5.1.73 Source distribution

Protocol version: 10

Connection: Localhost via UNIX socket

Server characterset: latin1

Db characterset: utf8

Client characterset: latin1

Conn. characterset: latin1

UNIX socket: /tmp/mysql.sock

Uptime: 22 days 8 hours 31 min 23 sec

Threads: 38 Questions: 1037751897 Slow queries: 2356 Opens: 79836 Flush tables: 1 Open tables: 64 Queries per second avg: 537.282

--------------

在上面显示列表的最后一条，我们来查看Slow queries这一项的值，如果多次查看的值大于0的话,说明有些查询sql命令执行时间过长。

2)这时再通过show processlist命令来查看当前正在运行的SQL，从中找出运行慢的SQL语句，找到执行慢的语句后，再用explain命令查看这些语句的执行计划。

mysql> show processlist;

+--------+-----------+---------------------+--------------------+---------+-------+-------+------------------+

| Id | User | Host | db | Command | Time | State | Info |

+--------+-----------+---------------------+--------------------+---------+-------+-------+------------------+

| 50270 | ambari | DataBase-01:41512 | ambari | Sleep | 23 | | NULL |

| 50271 | ambari | DataBase-01:41511 | ambari | Sleep | 6 | | NULL |

| 50272 | ambari | DataBase-01:41514 | ambari | Sleep | 23 | | NULL |

| 62452 | oozie | DataBase-02:42987 | oozie | Sleep | 25 | | NULL |

| 63660 | ambari | DataBase-01:56052 | ambari | Sleep | 0 | | NULL |

| 110404 | push_user | localhost:33817 | quartz | Sleep | 12 | | NULL |

| 112835 | push_user | localhost:46571 | hibernate | Sleep | 1 | | NULL |

| 113163 | push_user | localhost:56585 | hibernate | Sleep | 1 | | NULL |

| 113289 | push_user | 14.118.132.20:47333 | DW | Sleep | 628 | | NULL |

| 113320 | push_user | localhost:47428 | hibernate | Sleep | 3 | | NULL |

| 113321 | push_user | localhost:47429 | hibernate | Sleep | 3 | | NULL |

| 113322 | push_user | localhost:47430 | hibernate | Sleep | 3 | | NULL |

| 113357 | push_user | localhost:52337 | hibernate | Sleep | 3 | | NULL |

| 113364 | push_user | localhost:57206 | hibernate | Sleep | 3 | | NULL |

| 113366 | push_user | localhost:34813 | hibernate | Sleep | 1 | | NULL |

| 113398 | push_user | localhost:37382 | hibernate | Sleep | 1 | | NULL |

| 113498 | push_user | localhost:47626 | quartz | Sleep | 12717 | | NULL |

| 113709 | push_user | localhost:59382 | hibernate | Sleep | 1 | | NULL |

| 113710 | push_user | localhost:33627 | hibernate | Sleep | 1 | | NULL |

| 113715 | hive | DataBase-02:54968 | hive | Sleep | 2390 | | NULL |

| 113716 | hive | DataBase-02:54969 | hive | Sleep | 2390 | | NULL |

| 113717 | hive | DataBase-02:54974 | hive | Sleep | 2336 | | NULL |

| 113718 | hive | DataBase-02:54975 | hive | Sleep | 2336 | | NULL |

| 113719 | push_user | localhost:48243 | hibernate | Sleep | 1 | | NULL |

| 113720 | push_user | localhost:48245 | hibernate | Sleep | 1 | | NULL |

| 113721 | push_user | localhost:48244 | hibernate | Sleep | 1 | | NULL |

| 113722 | push_user | localhost:48247 | hibernate | Sleep | 1 | | NULL |

| 113723 | push_user | localhost:48249 | hibernate | Sleep | 1 | | NULL |

| 113724 | push_user | localhost:48248 | hibernate | Sleep | 1 | | NULL |

| 113745 | push_user | localhost:50684 | hibernate | Sleep | 1 | | NULL |

| 113746 | push_user | localhost:50685 | hibernate | Sleep | 1 | | NULL |

| 113747 | push_user | localhost:50695 | hibernate | Sleep | 1 | | NULL |

| 113748 | push_user | localhost:50696 | hibernate | Sleep | 1 | | NULL |

| 113749 | push_user | localhost:50697 | hibernate | Sleep | 1 | | NULL |

| 113750 | push_user | localhost:50699 | hibernate | Sleep | 1 | | NULL |

| 113751 | push_user | localhost:50700 | hibernate | Sleep | 1 | | NULL |

| 113752 | push_user | localhost | information_schema | Query | 0 | NULL | show processlist |

| 113753 | push_user | 14.118.132.20:28688 | DW | Sleep | 396 | | NULL |

+--------+-----------+---------------------+--------------------+---------+-------+-------+------------------+

38 rows in set (0.00 sec)

或者通过如下命令查询:

mysql> use information_schema;

mysql> select * from PROCESSLIST where info is not null;

+--------+-----------+-----------+--------------------+---------+------+-----------+--------------------------------------------------+

| ID | USER | HOST | DB | COMMAND | TIME | STATE | INFO |

+--------+-----------+-----------+--------------------+---------+------+-----------+--------------------------------------------------+

| 113752 | push_user | localhost | information_schema | Query | 0 | executing | select * from PROCESSLIST where info is not null |

+--------+-----------+-----------+--------------------+---------+------+-----------+--------------------------------------------------+

1 row in set (0.00 sec)

MySQL使用profile分析SQL执行状态

打开profile

1. mysql> select @@have_profiling;
2. +------------------+
3. | @@have_profiling |
4. +------------------+
5. | YES |
6. +------------------+
7. 1 row in set (0.00 sec)
9. mysql> select @@profiling;
10. +-------------+
11. | @@profiling |
12. +-------------+
13. | 0 |
14. +-------------+
15. 1 row in set (0.00 sec)
17. mysql> set session profiling=1;
18. Query OK, 0 rows affected (0.00 sec)
20. mysql> select @@profiling;
21. +-------------+
22. | @@profiling |
23. +-------------+
24. | 1 |
25. +-------------+
26. 1 row in set (0.00 sec)

[plain] view plain copy

print ?

1. mysql> select @@have_profiling;  
2. +------------------+  
3. | @@have_profiling |  
4. +------------------+  
5. | YES              |  
6. +------------------+  
7. 1 row in set (0.00 sec)  
8.   
9. mysql> select @@profiling;  
10. +-------------+  
11. | @@profiling |  
12. +-------------+  
13. |           0 |  
14. +-------------+  
15. 1 row in set (0.00 sec)  
16.   
17. mysql> set session profiling=1;  
18. Query OK, 0 rows affected (0.00 sec)  
19.   
20. mysql> select @@profiling;  
21. +-------------+  
22. | @@profiling |  
23. +-------------+  
24. |           1 |  
25. +-------------+  
26. 1 row in set (0.00 sec)  

mysql> select @@have_profiling;+------------------+| @@have_profiling |+------------------+| YES              |+------------------+1 row in set (0.00 sec)mysql> select @@profiling;+-------------+| @@profiling |+-------------+|           0 |+-------------+1 row in set (0.00 sec)mysql> set session profiling=1;Query OK, 0 rows affected (0.00 sec)mysql> select @@profiling;+-------------+| @@profiling |+-------------+|           1 |+-------------+1 row in set (0.00 sec)

使用profile分析SQL，可以看到执行两次后,Send data和sending cached result to clien执行效率的变化

1. mysql> select count(*) from sakila.payment;
2. +----------+
3. | count(*) |
4. +----------+
5. | 16049 |
6. +----------+
7. 1 row in set (0.03 sec)
9. mysql> show profiles;
10. +----------+------------+-------------------------------------+
11. | Query_ID | Duration | Query |
12. +----------+------------+-------------------------------------+
13. | 1 | 0.00020400 | select @@profiling |
14. | 2 | 0.00008900 | select count(*) from payment |
15. | 3 | 0.00006800 | show databaes |
16. | 4 | 0.02102800 | show databases |
17. | 5 | 0.02847600 | select count(*) from sakila.payment |
18. +----------+------------+-------------------------------------+
19. 5 rows in set (0.00 sec)

[plain] view plain copy

print ?

1. mysql> select count(*) from sakila.payment;  
2. +----------+  
3. | count(*) |  
4. +----------+  
5. |    16049 |  
6. +----------+  
7. 1 row in set (0.03 sec)  
8.   
9. mysql> show profiles;  
10. +----------+------------+-------------------------------------+  
11. | Query_ID | Duration   | Query                               |  
12. +----------+------------+-------------------------------------+  
13. |        1 | 0.00020400 | select @@profiling                  |  
14. |        2 | 0.00008900 | select count(*) from payment        |  
15. |        3 | 0.00006800 | show databaes                       |  
16. |        4 | 0.02102800 | show databases                      |  
17. |        5 | 0.02847600 | select count(*) from sakila.payment |  
18. +----------+------------+-------------------------------------+  
19. 5 rows in set (0.00 sec)  

mysql> select count(*) from sakila.payment;+----------+| count(*) |+----------+|    16049 |+----------+1 row in set (0.03 sec)mysql> show profiles;+----------+------------+-------------------------------------+| Query_ID | Duration   | Query                               |+----------+------------+-------------------------------------+|        1 | 0.00020400 | select @@profiling                  ||        2 | 0.00008900 | select count(*) from payment        ||        3 | 0.00006800 | show databaes                       ||        4 | 0.02102800 | show databases                      ||        5 | 0.02847600 | select count(*) from sakila.payment |+----------+------------+-------------------------------------+5 rows in set (0.00 sec)

 

1. mysql> show profile for query 5;
2. +--------------------------------+----------+
3. | Status | Duration |
4. +--------------------------------+----------+
5. | starting | 0.000030 |
6. | Waiting for query cache lock | 0.000005 |
7. | checking query cache for query | 0.000043 |
8. | checking permissions | 0.000007 |
9. | Opening tables | 0.000027 |
10. | System lock | 0.000010 |
11. | Waiting for query cache lock | 0.000010 |
12. | init | 0.000000 |
13. | optimizing | 0.023255 |
14. | statistics | 0.000118 |
15. | preparing | 0.000041 |
16. | executing | 0.000033 |
17. | Sending data | 0.003833 |
18. | end | 0.000054 |
19. | query end | 0.000045 |
20. | closing tables | 0.000045 |
21. | freeing items | 0.000072 |
22. | Waiting for query cache lock | 0.000033 |
23. | freeing items | 0.000785 |
24. | Waiting for query cache lock | 0.000016 |
25. | freeing items | 0.000002 |
26. | storing result in query cache | 0.000005 |
27. | logging slow query | 0.000003 |
28. | cleaning up | 0.000004 |
29. +--------------------------------+----------+
30. 24 rows in set (0.00 sec)
32. mysql> select count(*) from sakila.payment;
33. +----------+
34. | count(*) |
35. +----------+
36. | 16049 |
37. +----------+
38. 1 row in set (0.00 sec)
40. mysql> show profiles;
41. +----------+------------+-------------------------------------+
42. | Query_ID | Duration | Query |
43. +----------+------------+-------------------------------------+
44. | 1 | 0.00020400 | select @@profiling |
45. | 2 | 0.00008900 | select count(*) from payment |
46. | 3 | 0.00006800 | show databaes |
47. | 4 | 0.02102800 | show databases |
48. | 5 | 0.02847600 | select count(*) from sakila.payment |
49. | 6 | 0.00006900 | select count(*) from sakila.payment |
50. +----------+------------+-------------------------------------+
51. 6 rows in set (0.00 sec)
53. mysql> show profile for query 6;
54. +--------------------------------+----------+
55. | Status | Duration |
56. +--------------------------------+----------+
57. | starting | 0.000029 |
58. | Waiting for query cache lock | 0.000004 |
59. | checking query cache for query | 0.000007 |
60. | checking privileges on cached | 0.000004 |
61. | checking permissions | 0.000008 |
62. | sending cached result to clien | 0.000012 |
63. | logging slow query | 0.000002 |
64. | cleaning up | 0.000003 |
65. +--------------------------------+----------+
66. 8 rows in set (0.00 sec)

[plain] view plain copy

print ?

1. mysql> show profile for query 5;  
2. +--------------------------------+----------+  
3. | Status                         | Duration |  
4. +--------------------------------+----------+  
5. | starting                       | 0.000030 |  
6. | Waiting for query cache lock   | 0.000005 |  
7. | checking query cache for query | 0.000043 |  
8. | checking permissions           | 0.000007 |  
9. | Opening tables                 | 0.000027 |  
10. | System lock                    | 0.000010 |  
11. | Waiting for query cache lock   | 0.000010 |  
12. | init                           | 0.000000 |  
13. | optimizing                     | 0.023255 |  
14. | statistics                     | 0.000118 |  
15. | preparing                      | 0.000041 |  
16. | executing                      | 0.000033 |  
17. | Sending data                   | 0.003833 |  
18. | end                            | 0.000054 |  
19. | query end                      | 0.000045 |  
20. | closing tables                 | 0.000045 |  
21. | freeing items                  | 0.000072 |  
22. | Waiting for query cache lock   | 0.000033 |  
23. | freeing items                  | 0.000785 |  
24. | Waiting for query cache lock   | 0.000016 |  
25. | freeing items                  | 0.000002 |  
26. | storing result in query cache  | 0.000005 |  
27. | logging slow query             | 0.000003 |  
28. | cleaning up                    | 0.000004 |  
29. +--------------------------------+----------+  
30. 24 rows in set (0.00 sec)  
31.   
32. mysql> select count(*) from sakila.payment;  
33. +----------+  
34. | count(*) |  
35. +----------+  
36. |    16049 |  
37. +----------+  
38. 1 row in set (0.00 sec)  
39.   
40. mysql> show profiles;  
41. +----------+------------+-------------------------------------+  
42. | Query_ID | Duration   | Query                               |  
43. +----------+------------+-------------------------------------+  
44. |        1 | 0.00020400 | select @@profiling                  |  
45. |        2 | 0.00008900 | select count(*) from payment        |  
46. |        3 | 0.00006800 | show databaes                       |  
47. |        4 | 0.02102800 | show databases                      |  
48. |        5 | 0.02847600 | select count(*) from sakila.payment |  
49. |        6 | 0.00006900 | select count(*) from sakila.payment |  
50. +----------+------------+-------------------------------------+  
51. 6 rows in set (0.00 sec)  
52.   
53. mysql> show profile for query 6;  
54. +--------------------------------+----------+  
55. | Status                         | Duration |  
56. +--------------------------------+----------+  
57. | starting                       | 0.000029 |  
58. | Waiting for query cache lock   | 0.000004 |  
59. | checking query cache for query | 0.000007 |  
60. | checking privileges on cached  | 0.000004 |  
61. | checking permissions           | 0.000008 |  
62. | sending cached result to clien | 0.000012 |  
63. | logging slow query             | 0.000002 |  
64. | cleaning up                    | 0.000003 |  
65. +--------------------------------+----------+  
66. 8 rows in set (0.00 sec)  

mysql> show profile for query 5;+--------------------------------+----------+| Status                         | Duration |+--------------------------------+----------+| starting                       | 0.000030 || Waiting for query cache lock   | 0.000005 || checking query cache for query | 0.000043 || checking permissions           | 0.000007 || Opening tables                 | 0.000027 || System lock                    | 0.000010 || Waiting for query cache lock   | 0.000010 || init                           | 0.000000 || optimizing                     | 0.023255 || statistics                     | 0.000118 || preparing                      | 0.000041 || executing                      | 0.000033 || Sending data                   | 0.003833 || end                            | 0.000054 || query end                      | 0.000045 || closing tables                 | 0.000045 || freeing items                  | 0.000072 || Waiting for query cache lock   | 0.000033 || freeing items                  | 0.000785 || Waiting for query cache lock   | 0.000016 || freeing items                  | 0.000002 || storing result in query cache  | 0.000005 || logging slow query             | 0.000003 || cleaning up                    | 0.000004 |+--------------------------------+----------+24 rows in set (0.00 sec)mysql> select count(*) from sakila.payment;+----------+| count(*) |+----------+|    16049 |+----------+1 row in set (0.00 sec)mysql> show profiles;+----------+------------+-------------------------------------+| Query_ID | Duration   | Query                               |+----------+------------+-------------------------------------+|        1 | 0.00020400 | select @@profiling                  ||        2 | 0.00008900 | select count(*) from payment        ||        3 | 0.00006800 | show databaes                       ||        4 | 0.02102800 | show databases                      ||        5 | 0.02847600 | select count(*) from sakila.payment ||        6 | 0.00006900 | select count(*) from sakila.payment |+----------+------------+-------------------------------------+6 rows in set (0.00 sec)mysql> show profile for query 6;+--------------------------------+----------+| Status                         | Duration |+--------------------------------+----------+| starting                       | 0.000029 || Waiting for query cache lock   | 0.000004 || checking query cache for query | 0.000007 || checking privileges on cached  | 0.000004 || checking permissions           | 0.000008 || sending cached result to clien | 0.000012 || logging slow query             | 0.000002 || cleaning up                    | 0.000003 |+--------------------------------+----------+8 rows in set (0.00 sec)

sending data比较耗费cpu

1. mysql> select min(seq) seq,state,count(*) numb_ops,
2. -> round(sum(duration),5) sum_dur, round(avg(duration),5) avg_dur,
3. -> round(sum(cpu_user),5) sum_cpu, round(avg(cpu_user),5) avg_cpu
4. -> from information_schema.profiling
5. -> where query_id = 5
6. -> group by state
7. -> order by seq;
8. +------+--------------------------------+----------+---------+---------+---------+---------+
9. | seq | state | numb_ops | sum_dur | avg_dur | sum_cpu | avg_cpu |
10. +------+--------------------------------+----------+---------+---------+---------+---------+
11. | 2 | starting | 1 | 0.00003 | 0.00003 | 0.00000 | 0.00000 |
12. | 3 | Waiting for query cache lock | 4 | 0.00006 | 0.00002 | 0.00100 | 0.00025 |
13. | 4 | checking query cache for query | 1 | 0.00004 | 0.00004 | 0.00000 | 0.00000 |
14. | 5 | checking permissions | 1 | 0.00001 | 0.00001 | 0.00000 | 0.00000 |
15. | 6 | Opening tables | 1 | 0.00003 | 0.00003 | 0.00000 | 0.00000 |
16. | 7 | System lock | 1 | 0.00001 | 0.00001 | 0.00000 | 0.00000 |
17. | 9 | init | 1 | 0.00000 | 0.00000 | 0.00000 | 0.00000 |
18. | 10 | optimizing | 1 | 0.02326 | 0.02326 | 0.00000 | 0.00000 |
19. | 11 | statistics | 1 | 0.00012 | 0.00012 | 0.00000 | 0.00000 |
20. | 12 | preparing | 1 | 0.00004 | 0.00004 | 0.00000 | 0.00000 |
21. | 13 | executing | 1 | 0.00003 | 0.00003 | 0.00000 | 0.00000 |
22. | 14 | Sending data | 1 | 0.00383 | 0.00383 | 0.00300 | 0.00300 |
23. | 15 | end | 1 | 0.00005 | 0.00005 | 0.00000 | 0.00000 |
24. | 16 | query end | 1 | 0.00005 | 0.00005 | 0.00000 | 0.00000 |
25. | 17 | closing tables | 1 | 0.00005 | 0.00005 | 0.00000 | 0.00000 |
26. | 18 | freeing items | 3 | 0.00086 | 0.00029 | 0.00000 | 0.00000 |
27. | 23 | storing result in query cache | 1 | 0.00001 | 0.00001 | 0.00000 | 0.00000 |
28. | 24 | logging slow query | 1 | 0.00000 | 0.00000 | 0.00000 | 0.00000 |
29. | 25 | cleaning up | 1 | 0.00000 | 0.00000 | 0.00000 | 0.00000 |
30. +------+--------------------------------+----------+---------+---------+---------+---------+
31. 19 rows in set (0.00 sec)
33. mysql> show profile cpu for query 5;
34. +--------------------------------+----------+----------+------------+
35. | Status | Duration | CPU_user | CPU_system |
36. +--------------------------------+----------+----------+------------+
37. | starting | 0.000030 | 0.000000 | 0.000000 |
38. | Waiting for query cache lock | 0.000005 | 0.000000 | 0.000000 |
39. | checking query cache for query | 0.000043 | 0.000000 | 0.000000 |
40. | checking permissions | 0.000007 | 0.000000 | 0.000000 |
41. | Opening tables | 0.000027 | 0.000000 | 0.000000 |
42. | System lock | 0.000010 | 0.000000 | 0.000000 |
43. | Waiting for query cache lock | 0.000010 | 0.001000 | 0.000000 |
44. | init | 0.000000 | 0.000000 | 0.000000 |
45. | optimizing | 0.023255 | 0.000000 | 0.000000 |
46. | statistics | 0.000118 | 0.000000 | 0.000000 |
47. | preparing | 0.000041 | 0.000000 | 0.000000 |
48. | executing | 0.000033 | 0.000000 | 0.000000 |
49. | Sending data | 0.003833 | 0.002999 | 0.001000 |
50. | end | 0.000054 | 0.000000 | 0.000000 |
51. | query end | 0.000045 | 0.000000 | 0.000000 |
52. | closing tables | 0.000045 | 0.000000 | 0.000000 |
53. | freeing items | 0.000072 | 0.000000 | 0.000000 |
54. | Waiting for query cache lock | 0.000033 | 0.000000 | 0.000000 |
55. | freeing items | 0.000785 | 0.000000 | 0.000000 |
56. | Waiting for query cache lock | 0.000016 | 0.000000 | 0.000000 |
57. | freeing items | 0.000002 | 0.000000 | 0.000000 |
58. | storing result in query cache | 0.000005 | 0.000000 | 0.000000 |
59. | logging slow query | 0.000003 | 0.000000 | 0.000000 |
60. | cleaning up | 0.000004 | 0.000000 | 0.000000 |
61. +--------------------------------+----------+----------+------------+
62. 24 rows in set (0.00 sec)
64. mysql> show profile block io for query 5;
65. +--------------------------------+----------+--------------+---------------+
66. | Status | Duration | Block_ops_in | Block_ops_out |
67. +--------------------------------+----------+--------------+---------------+
68. | starting | 0.000030 | 0 | 0 |
69. | Waiting for query cache lock | 0.000005 | 0 | 0 |
70. | checking query cache for query | 0.000043 | 0 | 0 |
71. | checking permissions | 0.000007 | 0 | 0 |
72. | Opening tables | 0.000027 | 0 | 0 |
73. | System lock | 0.000010 | 0 | 0 |
74. | Waiting for query cache lock | 0.000010 | 0 | 0 |
75. | init | 0.000000 | 0 | 0 |
76. | optimizing | 0.023255 | 0 | 0 |
77. | statistics | 0.000118 | 0 | 0 |
78. | preparing | 0.000041 | 0 | 0 |
79. | executing | 0.000033 | 0 | 0 |
80. | Sending data | 0.003833 | 0 | 0 |
81. | end | 0.000054 | 0 | 0 |
82. | query end | 0.000045 | 0 | 0 |
83. | closing tables | 0.000045 | 0 | 0 |
84. | freeing items | 0.000072 | 0 | 0 |
85. | Waiting for query cache lock | 0.000033 | 0 | 0 |
86. | freeing items | 0.000785 | 0 | 0 |
87. | Waiting for query cache lock | 0.000016 | 0 | 0 |
88. | freeing items | 0.000002 | 0 | 0 |
89. | storing result in query cache | 0.000005 | 0 | 0 |
90. | logging slow query | 0.000003 | 0 | 0 |
91. | cleaning up | 0.000004 | 0 | 0 |
92. +--------------------------------+----------+--------------+---------------+
93. 24 rows in set (0.00 sec)

[plain] view plain copy

print ?

1. mysql> select min(seq) seq,state,count(*) numb_ops,  
2.     ->     round(sum(duration),5) sum_dur, round(avg(duration),5) avg_dur,  
3.     ->     round(sum(cpu_user),5) sum_cpu, round(avg(cpu_user),5) avg_cpu  
4.     ->     from information_schema.profiling  
5.     ->     where query_id = 5  
6.     ->     group by state  
7.     ->     order by seq;  
8. +------+--------------------------------+----------+---------+---------+---------+---------+  
9. | seq  | state                          | numb_ops | sum_dur | avg_dur | sum_cpu | avg_cpu |  
10. +------+--------------------------------+----------+---------+---------+---------+---------+  
11. |    2 | starting                       |        1 | 0.00003 | 0.00003 | 0.00000 | 0.00000 |  
12. |    3 | Waiting for query cache lock   |        4 | 0.00006 | 0.00002 | 0.00100 | 0.00025 |  
13. |    4 | checking query cache for query |        1 | 0.00004 | 0.00004 | 0.00000 | 0.00000 |  
14. |    5 | checking permissions           |        1 | 0.00001 | 0.00001 | 0.00000 | 0.00000 |  
15. |    6 | Opening tables                 |        1 | 0.00003 | 0.00003 | 0.00000 | 0.00000 |  
16. |    7 | System lock                    |        1 | 0.00001 | 0.00001 | 0.00000 | 0.00000 |  
17. |    9 | init                           |        1 | 0.00000 | 0.00000 | 0.00000 | 0.00000 |  
18. |   10 | optimizing                     |        1 | 0.02326 | 0.02326 | 0.00000 | 0.00000 |  
19. |   11 | statistics                     |        1 | 0.00012 | 0.00012 | 0.00000 | 0.00000 |  
20. |   12 | preparing                      |        1 | 0.00004 | 0.00004 | 0.00000 | 0.00000 |  
21. |   13 | executing                      |        1 | 0.00003 | 0.00003 | 0.00000 | 0.00000 |  
22. |   14 | Sending data                   |        1 | 0.00383 | 0.00383 | 0.00300 | 0.00300 |  
23. |   15 | end                            |        1 | 0.00005 | 0.00005 | 0.00000 | 0.00000 |  
24. |   16 | query end                      |        1 | 0.00005 | 0.00005 | 0.00000 | 0.00000 |  
25. |   17 | closing tables                 |        1 | 0.00005 | 0.00005 | 0.00000 | 0.00000 |  
26. |   18 | freeing items                  |        3 | 0.00086 | 0.00029 | 0.00000 | 0.00000 |  
27. |   23 | storing result in query cache  |        1 | 0.00001 | 0.00001 | 0.00000 | 0.00000 |  
28. |   24 | logging slow query             |        1 | 0.00000 | 0.00000 | 0.00000 | 0.00000 |  
29. |   25 | cleaning up                    |        1 | 0.00000 | 0.00000 | 0.00000 | 0.00000 |  
30. +------+--------------------------------+----------+---------+---------+---------+---------+  
31. 19 rows in set (0.00 sec)  
32.   
33. mysql> show profile cpu for query 5;  
34. +--------------------------------+----------+----------+------------+  
35. | Status                         | Duration | CPU_user | CPU_system |  
36. +--------------------------------+----------+----------+------------+  
37. | starting                       | 0.000030 | 0.000000 |   0.000000 |  
38. | Waiting for query cache lock   | 0.000005 | 0.000000 |   0.000000 |  
39. | checking query cache for query | 0.000043 | 0.000000 |   0.000000 |  
40. | checking permissions           | 0.000007 | 0.000000 |   0.000000 |  
41. | Opening tables                 | 0.000027 | 0.000000 |   0.000000 |  
42. | System lock                    | 0.000010 | 0.000000 |   0.000000 |  
43. | Waiting for query cache lock   | 0.000010 | 0.001000 |   0.000000 |  
44. | init                           | 0.000000 | 0.000000 |   0.000000 |  
45. | optimizing                     | 0.023255 | 0.000000 |   0.000000 |  
46. | statistics                     | 0.000118 | 0.000000 |   0.000000 |  
47. | preparing                      | 0.000041 | 0.000000 |   0.000000 |  
48. | executing                      | 0.000033 | 0.000000 |   0.000000 |  
49. | Sending data                   | 0.003833 | 0.002999 |   0.001000 |  
50. | end                            | 0.000054 | 0.000000 |   0.000000 |  
51. | query end                      | 0.000045 | 0.000000 |   0.000000 |  
52. | closing tables                 | 0.000045 | 0.000000 |   0.000000 |  
53. | freeing items                  | 0.000072 | 0.000000 |   0.000000 |  
54. | Waiting for query cache lock   | 0.000033 | 0.000000 |   0.000000 |  
55. | freeing items                  | 0.000785 | 0.000000 |   0.000000 |  
56. | Waiting for query cache lock   | 0.000016 | 0.000000 |   0.000000 |  
57. | freeing items                  | 0.000002 | 0.000000 |   0.000000 |  
58. | storing result in query cache  | 0.000005 | 0.000000 |   0.000000 |  
59. | logging slow query             | 0.000003 | 0.000000 |   0.000000 |  
60. | cleaning up                    | 0.000004 | 0.000000 |   0.000000 |  
61. +--------------------------------+----------+----------+------------+  
62. 24 rows in set (0.00 sec)  
63.   
64. mysql> show profile block io for query 5;  
65. +--------------------------------+----------+--------------+---------------+  
66. | Status                         | Duration | Block_ops_in | Block_ops_out |  
67. +--------------------------------+----------+--------------+---------------+  
68. | starting                       | 0.000030 |            0 |             0 |  
69. | Waiting for query cache lock   | 0.000005 |            0 |             0 |  
70. | checking query cache for query | 0.000043 |            0 |             0 |  
71. | checking permissions           | 0.000007 |            0 |             0 |  
72. | Opening tables                 | 0.000027 |            0 |             0 |  
73. | System lock                    | 0.000010 |            0 |             0 |  
74. | Waiting for query cache lock   | 0.000010 |            0 |             0 |  
75. | init                           | 0.000000 |            0 |             0 |  
76. | optimizing                     | 0.023255 |            0 |             0 |  
77. | statistics                     | 0.000118 |            0 |             0 |  
78. | preparing                      | 0.000041 |            0 |             0 |  
79. | executing                      | 0.000033 |            0 |             0 |  
80. | Sending data                   | 0.003833 |            0 |             0 |  
81. | end                            | 0.000054 |            0 |             0 |  
82. | query end                      | 0.000045 |            0 |             0 |  
83. | closing tables                 | 0.000045 |            0 |             0 |  
84. | freeing items                  | 0.000072 |            0 |             0 |  
85. | Waiting for query cache lock   | 0.000033 |            0 |             0 |  
86. | freeing items                  | 0.000785 |            0 |             0 |  
87. | Waiting for query cache lock   | 0.000016 |            0 |             0 |  
88. | freeing items                  | 0.000002 |            0 |             0 |  
89. | storing result in query cache  | 0.000005 |            0 |             0 |  
90. | logging slow query             | 0.000003 |            0 |             0 |  
91. | cleaning up                    | 0.000004 |            0 |             0 |  
92. +--------------------------------+----------+--------------+---------------+  
93. 24 rows in set (0.00 sec)  

mysql> select min(seq) seq,state,count(*) numb_ops,    ->     round(sum(duration),5) sum_dur, round(avg(duration),5) avg_dur,    ->     round(sum(cpu_user),5) sum_cpu, round(avg(cpu_user),5) avg_cpu    ->     from information_schema.profiling    ->     where query_id = 5    ->     group by state    ->     order by seq;+------+--------------------------------+----------+---------+---------+---------+---------+| seq  | state                          | numb_ops | sum_dur | avg_dur | sum_cpu | avg_cpu |+------+--------------------------------+----------+---------+---------+---------+---------+|    2 | starting                       |        1 | 0.00003 | 0.00003 | 0.00000 | 0.00000 ||    3 | Waiting for query cache lock   |        4 | 0.00006 | 0.00002 | 0.00100 | 0.00025 ||    4 | checking query cache for query |        1 | 0.00004 | 0.00004 | 0.00000 | 0.00000 ||    5 | checking permissions           |        1 | 0.00001 | 0.00001 | 0.00000 | 0.00000 ||    6 | Opening tables                 |        1 | 0.00003 | 0.00003 | 0.00000 | 0.00000 ||    7 | System lock                    |        1 | 0.00001 | 0.00001 | 0.00000 | 0.00000 ||    9 | init                           |        1 | 0.00000 | 0.00000 | 0.00000 | 0.00000 ||   10 | optimizing                     |        1 | 0.02326 | 0.02326 | 0.00000 | 0.00000 ||   11 | statistics                     |        1 | 0.00012 | 0.00012 | 0.00000 | 0.00000 ||   12 | preparing                      |        1 | 0.00004 | 0.00004 | 0.00000 | 0.00000 ||   13 | executing                      |        1 | 0.00003 | 0.00003 | 0.00000 | 0.00000 ||   14 | Sending data                   |        1 | 0.00383 | 0.00383 | 0.00300 | 0.00300 ||   15 | end                            |        1 | 0.00005 | 0.00005 | 0.00000 | 0.00000 ||   16 | query end                      |        1 | 0.00005 | 0.00005 | 0.00000 | 0.00000 ||   17 | closing tables                 |        1 | 0.00005 | 0.00005 | 0.00000 | 0.00000 ||   18 | freeing items                  |        3 | 0.00086 | 0.00029 | 0.00000 | 0.00000 ||   23 | storing result in query cache  |        1 | 0.00001 | 0.00001 | 0.00000 | 0.00000 ||   24 | logging slow query             |        1 | 0.00000 | 0.00000 | 0.00000 | 0.00000 ||   25 | cleaning up                    |        1 | 0.00000 | 0.00000 | 0.00000 | 0.00000 |+------+--------------------------------+----------+---------+---------+---------+---------+19 rows in set (0.00 sec)mysql> show profile cpu for query 5;+--------------------------------+----------+----------+------------+| Status                         | Duration | CPU_user | CPU_system |+--------------------------------+----------+----------+------------+| starting                       | 0.000030 | 0.000000 |   0.000000 || Waiting for query cache lock   | 0.000005 | 0.000000 |   0.000000 || checking query cache for query | 0.000043 | 0.000000 |   0.000000 || checking permissions           | 0.000007 | 0.000000 |   0.000000 || Opening tables                 | 0.000027 | 0.000000 |   0.000000 || System lock                    | 0.000010 | 0.000000 |   0.000000 || Waiting for query cache lock   | 0.000010 | 0.001000 |   0.000000 || init                           | 0.000000 | 0.000000 |   0.000000 || optimizing                     | 0.023255 | 0.000000 |   0.000000 || statistics                     | 0.000118 | 0.000000 |   0.000000 || preparing                      | 0.000041 | 0.000000 |   0.000000 || executing                      | 0.000033 | 0.000000 |   0.000000 || Sending data                   | 0.003833 | 0.002999 |   0.001000 || end                            | 0.000054 | 0.000000 |   0.000000 || query end                      | 0.000045 | 0.000000 |   0.000000 || closing tables                 | 0.000045 | 0.000000 |   0.000000 || freeing items                  | 0.000072 | 0.000000 |   0.000000 || Waiting for query cache lock   | 0.000033 | 0.000000 |   0.000000 || freeing items                  | 0.000785 | 0.000000 |   0.000000 || Waiting for query cache lock   | 0.000016 | 0.000000 |   0.000000 || freeing items                  | 0.000002 | 0.000000 |   0.000000 || storing result in query cache  | 0.000005 | 0.000000 |   0.000000 || logging slow query             | 0.000003 | 0.000000 |   0.000000 || cleaning up                    | 0.000004 | 0.000000 |   0.000000 |+--------------------------------+----------+----------+------------+24 rows in set (0.00 sec)mysql> show profile block io for query 5;+--------------------------------+----------+--------------+---------------+| Status                         | Duration | Block_ops_in | Block_ops_out |+--------------------------------+----------+--------------+---------------+| starting                       | 0.000030 |            0 |             0 || Waiting for query cache lock   | 0.000005 |            0 |             0 || checking query cache for query | 0.000043 |            0 |             0 || checking permissions           | 0.000007 |            0 |             0 || Opening tables                 | 0.000027 |            0 |             0 || System lock                    | 0.000010 |            0 |             0 || Waiting for query cache lock   | 0.000010 |            0 |             0 || init                           | 0.000000 |            0 |             0 || optimizing                     | 0.023255 |            0 |             0 || statistics                     | 0.000118 |            0 |             0 || preparing                      | 0.000041 |            0 |             0 || executing                      | 0.000033 |            0 |             0 || Sending data                   | 0.003833 |            0 |             0 || end                            | 0.000054 |            0 |             0 || query end                      | 0.000045 |            0 |             0 || closing tables                 | 0.000045 |            0 |             0 || freeing items                  | 0.000072 |            0 |             0 || Waiting for query cache lock   | 0.000033 |            0 |             0 || freeing items                  | 0.000785 |            0 |             0 || Waiting for query cache lock   | 0.000016 |            0 |             0 || freeing items                  | 0.000002 |            0 |             0 || storing result in query cache  | 0.000005 |            0 |             0 || logging slow query             | 0.000003 |            0 |             0 || cleaning up                    | 0.000004 |            0 |             0 |+--------------------------------+----------+--------------+---------------+24 rows in set (0.00 sec)

再看同结构数据的MyISAM表

1. mysql> create table payment_myisam like payment;
2. Query OK, 0 rows affected (0.03 sec)
4. mysql> alter table payment_myisam engine=myisam;
5. Query OK, 0 rows affected (0.03 sec)
6. Records: 0 Duplicates: 0 Warnings: 0
8. mysql> show create table payment_myisam\G
9. *************************** 1. row ***************************
10. Table: payment_myisam
11. Create Table: CREATE TABLE `payment_myisam` (
12. `payment_id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
13. `customer_id` smallint(5) unsigned NOT NULL,
14. `staff_id` tinyint(3) unsigned NOT NULL,
15. `rental_id` int(11) DEFAULT NULL,
16. `amount` decimal(5,2) NOT NULL,
17. `payment_date` datetime NOT NULL,
18. `last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
19. PRIMARY KEY (`payment_id`),
20. KEY `idx_fk_staff_id` (`staff_id`),
21. KEY `idx_fk_customer_id` (`customer_id`),
22. KEY `fk_payment_rental` (`rental_id`)
23. ) ENGINE=MyISAM DEFAULT CHARSET=utf8
24. 1 row in set (0.00 sec)
26. mysql> insert into payment_myisam select * from payment;
27. Query OK, 16049 rows affected (0.10 sec)
28. Records: 16049 Duplicates: 0 Warnings: 0

[plain] view plain copy

print ?

1. mysql> create table payment_myisam like payment;  
2. Query OK, 0 rows affected (0.03 sec)  
3.   
4. mysql> alter table payment_myisam engine=myisam;  
5. Query OK, 0 rows affected (0.03 sec)  
6. Records: 0  Duplicates: 0  Warnings: 0  
7.   
8. mysql> show create table payment_myisam\G  
9. *************************** 1. row ***************************  
10.        Table: payment_myisam  
11. Create Table: CREATE TABLE `payment_myisam` (  
12.   `payment_id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,  
13.   `customer_id` smallint(5) unsigned NOT NULL,  
14.   `staff_id` tinyint(3) unsigned NOT NULL,  
15.   `rental_id` int(11) DEFAULT NULL,  
16.   `amount` decimal(5,2) NOT NULL,  
17.   `payment_date` datetime NOT NULL,  
18.   `last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,  
19.   PRIMARY KEY (`payment_id`),  
20.   KEY `idx_fk_staff_id` (`staff_id`),  
21.   KEY `idx_fk_customer_id` (`customer_id`),  
22.   KEY `fk_payment_rental` (`rental_id`)  
23. ) ENGINE=MyISAM DEFAULT CHARSET=utf8  
24. 1 row in set (0.00 sec)  
25.   
26. mysql> insert into payment_myisam select * from payment;  
27. Query OK, 16049 rows affected (0.10 sec)  
28. Records: 16049  Duplicates: 0  Warnings: 0  

mysql> create table payment_myisam like payment;Query OK, 0 rows affected (0.03 sec)mysql> alter table payment_myisam engine=myisam;Query OK, 0 rows affected (0.03 sec)Records: 0  Duplicates: 0  Warnings: 0mysql> show create table payment_myisam\G*************************** 1. row ***************************       Table: payment_myisamCreate Table: CREATE TABLE `payment_myisam` (  `payment_id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,  `customer_id` smallint(5) unsigned NOT NULL,  `staff_id` tinyint(3) unsigned NOT NULL,  `rental_id` int(11) DEFAULT NULL,  `amount` decimal(5,2) NOT NULL,  `payment_date` datetime NOT NULL,  `last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,  PRIMARY KEY (`payment_id`),  KEY `idx_fk_staff_id` (`staff_id`),  KEY `idx_fk_customer_id` (`customer_id`),  KEY `fk_payment_rental` (`rental_id`)) ENGINE=MyISAM DEFAULT CHARSET=utf81 row in set (0.00 sec)mysql> insert into payment_myisam select * from payment;Query OK, 16049 rows affected (0.10 sec)Records: 16049  Duplicates: 0  Warnings: 0

 

1. mysql> select count(*) from payment_myisam;
2. +----------+
3. | count(*) |
4. +----------+
5. | 16049 |
6. +----------+
7. 1 row in set (0.01 sec)
9. mysql> show profiles;
11. | 23 | 0.09449600 | insert into payment_myisam select * from payment |
12. | 24 | 0.00023500 | select count(*) from payment_myisam |
14. 15 rows in set (0.00 sec)

[plain] view plain copy

print ?

1. mysql> select count(*) from payment_myisam;  
2. +----------+  
3. | count(*) |  
4. +----------+  
5. |    16049 |  
6. +----------+  
7. 1 row in set (0.01 sec)  
8.   
9. mysql> show profiles;  
10.                                                                                                                                                                           
11. |       23 | 0.09449600 | insert into payment_myisam select * from payment                                                                                                                                                                                                                                        |  
12. |       24 | 0.00023500 | select count(*) from payment_myisam                                                                                                                                                                                                                                                     |  
13.   
14. 15 rows in set (0.00 sec)  

mysql> select count(*) from payment_myisam;+----------+| count(*) |+----------+|    16049 |+----------+1 row in set (0.01 sec)mysql> show profiles;                                                                                                                                                                        |       23 | 0.09449600 | insert into payment_myisam select * from payment                                                                                                                                                                                                                                        ||       24 | 0.00023500 | select count(*) from payment_myisam                                                                                                                                                                                                                                                     |15 rows in set (0.00 sec)

 

1. mysql> show profile for query 24;
2. +--------------------------------+----------+
3. | Status | Duration |
4. +--------------------------------+----------+
5. | starting | 0.000026 |
6. | Waiting for query cache lock | 0.000003 |
7. | checking query cache for query | 0.000037 |
8. | checking permissions | 0.000006 |
9. | Opening tables | 0.000015 |
10. | System lock | 0.000009 |
11. | Waiting for query cache lock | 0.000019 |
12. | init | 0.000011 |
13. | optimizing | 0.000006 |
14. | executing | 0.000006 |
15. | end | 0.000000 |
16. | query end | 0.000001 |
17. | closing tables | 0.000008 |
18. | freeing items | 0.000019 |
19. | Waiting for query cache lock | 0.000008 |
20. | freeing items | 0.000013 |
21. | Waiting for query cache lock | 0.000008 |
22. | freeing items | 0.000008 |
23. | storing result in query cache | 0.000015 |
24. | logging slow query | 0.000008 |
25. | cleaning up | 0.000009 |
26. +--------------------------------+----------+