innodb缓冲池
2016-06-23 15:50
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innodb存储引擎缓冲池设置为21GB
innodb存储引擎的内存结构情况
可以设置多个缓冲池实例。每个页根据hash值分配到不同的缓冲池实例中,减少资源竞争,增加并发处理能力
在配置文件中将innodb_buffer_pool_instances设置大于1即可。查看innodb status
5.6中可以通过运行如下命令查看各个缓冲池使用状态
mysql> show variables like 'innodb_buffer_pool_size'\G; *************************** 1. row *************************** Variable_name: innodb_buffer_pool_size Value: 21474836480 1 row in set (0.00 sec)
innodb存储引擎的内存结构情况
可以设置多个缓冲池实例。每个页根据hash值分配到不同的缓冲池实例中,减少资源竞争,增加并发处理能力
mysql> show variables like 'innodb_buffer_pool_instances'\G; *************************** 1. row *************************** Variable_name: innodb_buffer_pool_instances Value: 4 1 row in set (0.00 sec)
在配置文件中将innodb_buffer_pool_instances设置大于1即可。查看innodb status
。。。。。。 ---BUFFER POOL 0 Buffer pool size 327680 Free buffers 327562 Database pages 118 Old database pages 0 Modified db pages 0 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 0, not young 0 0.00 youngs/s, 0.00 non-youngs/s Pages read 118, created 0, written 0 0.00 reads/s, 0.00 creates/s, 0.00 writes/s No buffer pool page gets since the last printout Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 118, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 1 Buffer pool size 327679 Free buffers 327658 Database pages 21 Old database pages 0 Modified db pages 0 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 0, not young 0 0.00 youngs/s, 0.00 non-youngs/s Pages read 21, created 0, written 0 0.00 reads/s, 0.00 creates/s, 0.00 writes/s No buffer pool page gets since the last printout Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 21, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] 。。。。。。
5.6中可以通过运行如下命令查看各个缓冲池使用状态
mysql> select pool_id,pool_size, -> free_buffers,database_pages -> from information_schema.innodb_buffer_pool_stats\G; *************************** 1. row *************************** pool_id: 0 pool_size: 327680 free_buffers: 327562 database_pages: 118 *************************** 2. row *************************** pool_id: 1 pool_size: 327679 free_buffers: 327658 database_pages: 21 *************************** 3. row *************************** pool_id: 2 pool_size: 327679 free_buffers: 327675 database_pages: 4 *************************** 4. row *************************** pool_id: 3 pool_size: 327679 free_buffers: 327596 database_pages: 83 4 rows in set (0.00 sec)
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