Fixed Size for the Read Ahead Area

InnoDB dynamically calculates the size of the read-ahead area in case it has to trigger its read-ahead algorithm. When the workload involves heavy I/O operations, this size is computed so frequently that it has a non-negligible impact on the CPU usage. With this fix, buffer read-ahead area size is precalculated once per buffer pool instance initialization, and this value is used each time read-ahead is invoked. This implementation should remove a bottleneck experienced by some users.

Version Specific Information

  • 5.6.13-60.5 : Percona Server 5.5 feature re-implemented

Other Information

Percona Server
Call Us
+1-888-316-9775 (USA - Sales)
+1-208-473-2904 (USA - Sales)
+44-208-133-0309 (UK - Sales)
0-800-051-8984 (UK - Sales)
0-800-181-0665 (GER - Sales)
+1-877-862-4316 (Emergency)
+1-855-55TRAIN (Training)
+1-925-271-5054 (Training)

Table Of Contents

Previous topic

HandlerSocket

Next topic

Thread Pool

This Page



© Copyright Percona LLC and/or its affiliates 2009-2014.
Except where otherwise noted, this documentation is licensed under the following license:
CC Attribution-ShareAlike 2.0 Generic
Created using Sphinx 1.2.2.
This documentation is developed in Launchpad as part of the Percona Server source code.
If you spotted innacuracies, errors, don't understood it or you think something is missing or should be improved, please file a bug.
]]>