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Displaying posts with tag: ALL_O_DRICT (reset)

Effects of ALL_O_DIRECT on a TPCC workload
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Recently Mark Callaghan blogged about using O_DIRECT for the InnoDB transaction log. He noted that there was not a significant performance gain if the number of concurrent connections increases. I've done my share of testing and retesting over the past months to determine how useful this is. Based on a small TPCC workload (100 warehouses, 64 connections, 1 hour test, 5 minute rampup), I've seen huge performance gains by setting ALL_O_DIRECT for the variable innodb_flush_method using Percona XtraDB.

Without using Direct I/O, the benchmark …

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