…buffer_pool_instancesblogpercona.commanual Innodb_buffer_pool_pages_datablogpercona.commanual Innodb_buffer_pool_pages_dirtyblogpercona.commanual Innodb_buffer_pool_pages_flushedblogpercona.commanual Innodb_buffer_pool_pages_freeblogpercona.commanual Innodb_buffer_pool…
Post: Innodb Recovery - Is large buffer pool always better ?
July 17, 2007 By 3 Comments
… page. So I took a shot at restarting MySQL with much smaller buffer pool size and we got it recovered much faster. Interesting… flush list could grow unrestricted without Innodb bothering to flush anything (I only could see reads while recovery was going with large buffer pool) plus large distinct amount of pages modified so a lot of pages had to be added to the flush list…
Post: Choosing innodb_buffer_pool_size
November 3, 2007 By 39 Comments
… usually much better to simply check it. Start MySQL With 10GB Innodb buffer pool for example and see how large RSS and VSZ… anything. On Linux, FreeBSD, Solaris you need to set innodb_flush_method=O_DIRECT. On other Operating Systems you may be…. You may want to make MySQL to use Large Pages for allocating Innodb Buffer Pool and few other buffers, which may have other performance…
Post: Troubleshooting MySQL Memory Usage
March 21, 2012 By 5 Comments
…MySQL to use reasonable global buffers, such as innodb_buffer_size, key_buffer_size etc, you have reasonable amount of connections but yet MySQL… to check though. Run “FLUSH TABLES” and see whenever … memory allocated 2623331 Buffer pool size 7864319 Buffer pool size, bytes 128849002496 Free buffers 1…
Post: Side load may massively impact your MySQL Performance
November 13, 2011 By 7 Comments
… Server 5.5.15 for this test with buffer pool size of 512MB and innodb_flush_method=O_DIRECT Test Setup: [root@localhost... ? To understand it we should take a look at the buffer pool contents. mysql [localhost] {msandbox} (information_schema) > select concat_ws(‘.’, t.schema… experience. Summary As we can see in default configuration MySQL has buffer pool which can be easily washed away by large table scans…
Post: Helgrinding MySQL with InnoDB for Synchronisation Errors, Fun and Profit
November 24, 2011 By 2 Comments
… not need much introduction, especially to the MySQL server developers. The Valgrind Memcheck tool, …to the fields of buf_pool->stat are unprotected. These are buffer pool statistics counters: number of …log0log.c:1472) ==9090== by 0x6B0E0E9: buf_flush_write_block_low (buf0flu.c:999) ==9090== …
Post: MySQL 5.5 and MySQL 5.6 default variable values differences
February 21, 2013 By 8 Comments
…INNODB_VERSION | 5.5.30 | 1.2.10 | | INNODB_BUFFER_POOL_INSTANCES | 1 | 8 | | QUERY_CACHE_SIZE | 0 | …| 1000 | 224 | | SOCKET | /tmp/mysql_sandbox5530.sock | /tmp/mysql_sandbox5610.sock | | INNODB_FILE_PER_TABLE | OFF … guaranty independently on file system flush policy. This probably will not impact…
Post: Is there room for more MySQL IO Optimization?
January 3, 2013 By 11 Comments
… to run MySQL with innodb_flush_method=O_DIRECT in most cases – it makes sure there is no overhead of double buffering and….28-29.1 on it with 6GB allocated for innodb_buffer_pool which with other memory needs leaves roughly 1GB for OS… 30GB in size including indexes which is way more than buffer pool size and OS cache which is available. I run CHECK…
Post: Reasons for MySQL Replication Lag
July 29, 2011 By 9 Comments
… setting sync_binlog=1, enabling log_slave_updates, setting innodb_flush_log_at_trx_commit=1. Also note there is no… can only do good” change as increasing buffer pool size could cause performance problems. MySQL Restart MySQL Restarts may include recovery time but what is the most important they often come with a need of warmup, because buffer pool…
Post: What is stored InnoDB buffer pool
September 28, 2008 By 8 Comments
…MySQL 5.0 which show innodb buffer pool content mysql> select * from information_schema.INNODB_BUFFER_POOL…
