数据库CPU 100%处理记录

mysql> show variables like ‘slow_query%‘;
+---------------------+----------------------------------------------+
| Variable_name       | Value                                        |
+---------------------+----------------------------------------------+
| slow_query_log      | ON                                           |
| slow_query_log_file | /rdsdbdata/log/slowquery/mysql-slowquery.log |
+---------------------+----------------------------------------------+
2 rows in set
mysql> show variables like ‘slow_launch_time‘;
+------------------+-------+
| Variable_name    | Value |
+------------------+-------+
| slow_launch_time | 1     |
+------------------+-------+
1 row in set

# User@Host: admin[admin] @  [10.0.11.12]  Id:  2302
# Query_time: 3.602910  Lock_time: 0.100585 Rows_sent: 2  Rows_examined: 4454
SET timestamp=1594629311;
SELECT a.enum_value,a.bsh_enum_value
        FROM external_mapping a
        LEFT JOIN external_bsh_command_key b ON a.bsh_command_id=b.id
        LEFT JOIN external_bsh_command_options c ON a.bsh_options_id=c.id
        LEFT JOIN external_command_key d ON a.command_id=d.id
        LEFT JOIN category h ON a.category_id=h.id
        where 1=1
            AND b.code=‘BSH.Common.Status.Event‘
            AND c.code=‘BSH.Common.Setting.Rm4Valve‘
            AND d.code=‘Rm4_Valve‘
            AND a.platform_id=119
            AND h.cname = ‘TT‘;

mysql> show OPEN TABLES where In_use > 0;
#查看是否有锁表
SELECT * FROM INFORMATION_SCHEMA.INNODB_LOCKS;
#查看正在锁的事务
Empty set
SELECT * FROM INFORMATION_SCHEMA.INNODB_LOCK_WAITS;
#查看等待锁的事务
Empty set
暂时没有看到锁表的情况

mysql> show global status like ‘Qca%‘;
+-------------------------+-----------+
| Variable_name           | Value     |
+-------------------------+-----------+
| Qcache_free_blocks      | 1         |
| Qcache_free_memory      | 134199912 |
| Qcache_hits             | 0         |
| Qcache_inserts          | 0         |
| Qcache_lowmem_prunes    | 0         |
| Qcache_not_cached       | 44950579  |
| Qcache_queries_in_cache | 0         |
| Qcache_total_blocks     | 1         |
+-------------------------+-----------+
8 rows in set
说明：
Qcache_hits：查询缓存命中次数。
Qcache_inserts：将查询和结果集写入到查询缓存中的次数。
Qcache_not_cached：不可以缓存的查询次数。
Qcache_queries_in_cache：查询缓存中缓存的查询量。

mysql> show engine innodb status;