… we see about Innodb log checkpointing and what does it tell us? mysql> SHOW ENGINE INNODB STATUS\G — LOG — Log sequence number 9682004056 Log flushed up to 9682004056… they are hitting their max checkpoint age. The way this increases dirty buffer flushing also doesn’t scale well on high…
Post: The relationship between Innodb Log checkpointing and dirty Buffer pool pages
February 17, 2012 By 5 Comments
Post: MySQL 5.5.8 - in search of stability
January 3, 2011 By 11 Comments
…innodb_log_file corresponds to changed pages in the buffer pool. You can compute this value as Log sequence number -… You can try to get stable throughput in MySQL 5.5.8 by playing with innodb_… must have the support of big log files (>4GB) to help increase throughput. Basically, by lowering …
Post: SHOW INNODB STATUS walk through
July 17, 2006 By 40 Comments
… of other things. In MySQL 5 number of Innodb performance counters were …log sequences can’t be overwritten in log files. By monitoring log sequence number and value up to which logs…increase it. You also can see number of pending normal log writes and number of checkpoint log writes. Number of log…
Post: How to estimate time it takes Innodb to Recover ?
May 9, 2007 By 7 Comments
… there is particular log sequence number up to which all modifications are already reflected in the database. Changes which have longer log sequence number may be… uncommitted transactions. As MySQL 5.0 these seems to be done in the background. In the future to increase recovery time even…
Post: How innodb_open_files affects performance
November 18, 2009 By 4 Comments
…file may be open or closed. Furthermore besides MySQL table_cache Innodb maintains its own (called …up to log sequence number 12682768136 091118 18:47:44 InnoDB: Starting an apply batch of log records to the… even with large number of tables and you can also safely increase this number if you like – …
Post: Can Innodb Read-Ahead reduce read performance ?
June 26, 2007 By 2 Comments
…number of mysqldump processes in parallel. Unlike in other case when we did load in parallel, dump in parallel did not increase…LOG — Log sequence number 586 10447960 Log flushed up to 586 10447960 Last checkpoint at 586 10264850 0 pending log writes, 0 pending chkp writes 1338030 log…from MySQL AB …
Post: Innodb Fuzzy checkpointing woes
May 10, 2006 By Leave a Comment
… assumes kind of uniform distribution of LSN (Log Sequence Number) for the pages which basically corresponds to …. This is very unusual case of increasing your buffer pool size actually may decrease performance…. However the shared drive at shared MySQL virtual hosting and powerful RAID system may…
