MySQL数据库服务器正在使用超过85％的内存

Question

MySQL数据库服务器正在使用超过85％的内存，尽管只有一个或两个连接运行select语句

内存利用率：

Tasks: 251 total, 1 running, 250 sleeping, 0 stopped, 0 zombie Cpu(s): 14.1%us, 2.2%sy, 0.0%ni, 83.7%id, 0.1%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 82521148k total, 73200520k used, 9320628k free, 280632k buffers Swap: 5242872k total, 3966636k used, 1276236k free, 851116k cached

顶

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 15224 mysql 20 0 113g 67g 5480 S 95.7 85.5 14490:38 mysqld 5053 root 20 0 4655m 132m 1756 S 0.7 0.2 238:44.07 java 2400 root 20 0 942m 7084 1788 S 0.3 0.0 63:54.37 dad 1 root 20 0 28052 552 332 S 0.0 0.0 0:10.99 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.27 kthreadd 3 root RT 0 0 0 0 S 0.0 0.0 0:17.17 migration/0 4 root 20 0 0 0 0 S 0.0 0.0 9:36.25 ksoftirqd/0 5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 6 root RT 0 0 0 0 S 0.0 0.0 0:08.29 watchdog/0 7 root RT 0 0 0 0 S 0.0 0.0 0:17.39 migration/1 8 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/1 9 root 20 0 0 0 0 S 0.0 0.0 6:27.07 ksoftirqd/1 10 root RT 0 0 0 0 S 0.0 0.0 0:07.06 watchdog/1 11 root RT 0 0 0 0 S 0.0 0.0 0:23.34 migration/2 Processlist : ------------ mysql> show full processlist ; +---------+-----------+------------------+--------+---------+------+--------------+-------------------------------------------------------------------------------------------------------------------------+ | Id | User | Host | db | Command | Time | State | Info | +---------+-----------+------------------+--------+---------+------+--------------+-------------------------------------------------------------------------------------------------------------------------+ | 3404546 | sampledb | 10.4.86.65:34777 | lordm | Sleep | 420 | | NULL | | 3411236 | root | localhost | NULL | Query | 0 | init | show full processlist | | | 3411356 | sampledb | 10.4.86.65:43134 | lordm | Sleep | 0 | | NULL | | 3411357 | sampledb | 10.4.86.65:43135 | lordm | Sleep | 0 | | NULL | | 3411358 | sampledb | 10.4.86.65:43136 | lordm | Sleep | 0 | | NULL | | 3411359 | sampledb | 10.4.86.65:43137 | lordm | Query | 0 | Sending data | SELECT 'REJECT' , r.src_id , r.src_id FROM sample_processd r WHERE last_machine_processed = 0 GROUP BY r.src_id | +---------+-----------+------------------+--------+---------+------+--------------+-------------------------------------------------------------------------------------------------------------------------+

mysql> show variables like '%innodb_buffer_pool%';
+-------------------------------------+----------------+
| Variable_name                       | Value          |
+-------------------------------------+----------------+
| innodb_buffer_pool_dump_at_shutdown | ON             |
| innodb_buffer_pool_dump_now         | OFF            |
| innodb_buffer_pool_filename         | ib_buffer_pool |
| innodb_buffer_pool_instances        | 47             |
| innodb_buffer_pool_load_abort       | OFF            |
| innodb_buffer_pool_load_at_startup  | ON             |
| innodb_buffer_pool_load_now         | OFF            |
| innodb_buffer_pool_size             | 50465865728    |
+-------------------------------------+----------------+
8 rows in set (0.00 sec)

Innodb缓冲池

OR

有人可以让我知道mysql内存消耗的可能原因以及有哪些修复方法？