Tag - Operating Systems

How to improve InnoDB performance by 55% for write-bound loads

Update: do not do this, this has been proven to corrupt data!
 
During April’s Percona Live MySQL Conference and Expo 2014, I attended a talk on MySQL 5.7 performance an scalability given by Dimitri Kravtchuk, the Oracle MySQL benchmark specialist. He mentioned at some point that the InnoDB double write buffer was a real performance […]

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Webinar: Best Practices for MySQL Scalability on May 1

“Best Practices for MySQL Scalability.”
If you have not already done so, I encourage you to register for my “Best Practices for MySQL Scalability” Webinar which will take place on May 1st at 10 a.m. PST. This will be an overview presentation, led by me and providing a high-level look at the components of MySQL […]

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Beware: ext3 and sync-binlog do not play well together

One of our customers reported strange problem with MySQL having extremely poor performance when sync-binlog=1 is enabled, even though the system with RAID and BBU were expected to have much better performance.
The problem could be repeated with SysBench as follows:

Shell

./sysbench –num-threads=2 –test=oltp –oltp-test-mode=complex –oltp-table-size=100000 –oltp-distinct-ranges=0 –oltp-order-ranges=0 –oltp-sum-ranges=0 –oltp-simple-ranges=0 –oltp-point-selects=0 –oltp-range-size=0 –mysql-table-engine=innodb […]

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