… hash functions to provide faster checksums) are now included in distributions. Fixes feature request #689992. (Aleksandr Kuzminsky)  Other Changes: innodb… is specified. (Yasufumi Kinoyasu) Added system variable have_response_time_distribution and compile option –without-response_time_distribution in Response Time Distribution. (Oleg Tsarev) Bugs Fixed Bug #643149 – Slow…
Comment: Testing Fusion-io ioDrive
May 4, 2012 By 2 Comments
Vadim, Do you have response time distribution for writes ? Also what Model/size of ioDrive is this ?
Post: Performance or Stability ???
April 1, 2011 By 16 Comments
… is response time what users will use to judge if your system is fast or slow. You will always see some response time distribution rather than all queries of the same time having same response time and this distribution will vary a lot. Typically the less outliers you have…
Post: Distributed Set Processing with Shard-Query
May 14, 2011 By 27 Comments
… over time. I realised that I could apply these same mathematical concepts to distributed queries as well, but with some minor differences. Having… node level. This means that Shard-Query does not have to have any idea of the structure of the data on which… new nodes in data center B and distribute the queries over both data centers. The response time should only be increased by the…
Post: Percona Server 5.5.18-23.0: Now with Group Commit!
December 19, 2011 By 3 Comments
…-cache-strip-comments feature ofPercona Server. We have fixed several causes for crashes, especially around…Response Time Distribution, which uses those operations, was made slightly more efficient. Bug fixed: #878022 (Laurynas Biveinis) An output buffer truncation check in Response Time Distribution…
Post: Percona Server 5.1.58-12.9
August 17, 2011 By 2 Comments
… across machine restarts. The configuration variables for my.cnf have been kept for compatibility and warnings will be printed … Other Changes Improvements and fixes on platform-specific distribution: The compilation of the Response Time Distribution patch has been fixed on Solaris (supported …
Post: Percona Server 5.5.14-20.5
August 17, 2011 By 4 Comments
…Two new collations, utf8_general50_ci and ucs2_general50_ci, have been to improve compatibility for those upgrading from MySQL … Other Changes Improvements and fixes on platform-specific distribution: The compilation of the Response Time Distribution patch has been fixed on Solaris (supported …
Post: Percona Server 5.1.49-rel12.0
September 15, 2010 By 6 Comments
…release model for Percona Server. From now on, we will have both Stable and Release Candidate releases. Release Candidates will …warnings is enabled. (Oleg Tsarev) response_time_distribution – Counts queries with very short execution times and groups them by time interval. (Oleg Tsarev) innodb_buffer…
Post: Percona Server 5.1.60-13.1
December 16, 2011 By Leave a Comment
… SET user variables. This could only occur with a sever having both master-master replication and –log-slave-updates enabled. This…. Bug Fixed: #878404 (Alexey Kopytov) The atomic operations used in Response Time Distribution on 32bit systems could (in theory) be optimized incorrectly by…
Post: The two even more fundamental performance metrics
May 5, 2011 By 6 Comments
… performance), and more. Analyze the distribution of service times. Service time is not the same as response time, which includes time spent waiting in the queue… to matter. Real systems have queueing — it’s just the way the world is. Arrivals clump up, response times vary, and queueing happens…
