…to produce the most optimal results, I moved … time-based flushing consistently hit about 27000 per second…constant and, potentially, submaximal, rate compared to dirty-page…MySQL configuration (configuration A) appears below: #####fixed innodb options innodb_file_format = barracuda innodb_buffer_pool…
Post: What MySQL buffer cache hit rate should you target
June 29, 2006 By 5 Comments
… cache hit rate is good for optimal MySQL Performance” is typical question I’m asked. It could by MyISAM key_buffer or Innodb innodb_buffer_pool it does not really matter. In both cases trying to come up with constant “good” hit rate is…
Post: MySQL 5.6 vs MySQL 5.5 and the Star Schema Benchmark
March 11, 2013 By 7 Comments
…buffer pool hit ratio during the MySQL 5.6 runs and MySQL…RATE: 0 * PAGES_CREATE_RATE: 0 PAGES_WRITTEN_RATE: 0.032257023966968806 * PAGES_WRITTEN_RATE: 0 NUMBER_PAGES_GET: 6731790 * NUMBER_PAGES_GET: 6731253 HIT_RATE: 995 * HIT_RATE…0 | 0 | 0 | 3 | 3 | | 8 | optimizing | 0.000048 | 0.000048 | 0.000000…
Post: SHOW INNODB STATUS walk through
July 17, 2006 By 40 Comments
… InnoDB 442 mysql tables in use 1, locked 0 MySQL thread id…buffer_size is optimal – if you see more than 30% of log buffer…buffer pool. Finally you can see buffer pool hit ratio which measures buffer pool efficiency. 1000/1000 corresponds to 100% hit rate. It is hard to tell what buffer pool hit rate…
Post: The relationship between Innodb Log checkpointing and dirty Buffer pool pages
February 17, 2012 By 10 Comments
…it tell us? mysql> SHOW ENGINE INNODB STATUS\G …optimize the Checkpoint age, it is flushing to try to optimize IO and to obey the LRU in the buffer pool. Since buffers…buffers and they are hitting their max checkpoint age. The way this increases dirty buffer… and the rate of transaction log growth…
Comment: MySQL 5.6.7-RC in tpcc-mysql benchmark
October 9, 2012 By 22 Comments
…fine with 4G or less. The optimal value for innodb_buffer_pool_instances depends in part on the … have been spreading the heat around if the buffer pool hit rate increased significantly. Not as much as if you…Oracle opinion consult a PR person. James Day, MySQL Senior Principal Support Engineer…
Post: Why you should ignore MySQL's key cache hit ratio
February 28, 2010 By 28 Comments
… advice about tuning MySQL‘s key cache hit ratio is …buffer, key_buffer, and key cache interchangeably. However, I will be careful about the difference between “rate… buffer hit or miss takes. If you approach application performance optimization…way to choose an innodb_buffer_pool_size setting? This is…
