June 19, 2013

Post: Galera Flow Control in Percona XtraDB Cluster for MySQL

…you find in standard async MySQL replication. It is my belief that …increasing the fc_limit Keeping the fc_limit small has two three purposes: It limits the amount of delay any node in… fc_limit does however keep the certification index smaller in memory. It … Conflct time name P cnf # name cmt sta Up…

Post: Profiling MySQL Memory Usage With Valgrind Massif

memory profile slowly growing overtime, indicating a possible memory bug. Whatever the reason, there is a simple but powerful way to profile MySQL memoryin my.cnfmysql client), you would execute whatever steps you think are necessary to increase memory usage/trigger the memory

Post: Heikki Tuuri answers to Innodb questions, Part II

mysql processes drops rapidly when you increase the amount of system memory. We just deployed a new Linux/Mysqlin a dedicated server is: set innodb_flush_method=O_DIRECT in my.cnf, to prevent double buffering. Configure as much memory… quantify what are the limits of different operations for …

Post: How innodb_open_files affects performance

MySQL 5.4.2 for tests which should be as good as it gets in terms of optimizations inmemoryIn my case after reading all tables I got “Dictionary memory…files_open in InnoDB: my.cnf. InnoDB:…limit=300 is not being that large liability even with large number of tables and you can also safely increase