> Tatsuo, would you please comment on this patch too? No problem. I will come up with a comment by the end of this week. -- Tatsuo Ishii SRA OSS, Inc. Japan
> --------------------------------------------------------------------------- > > Greg Smith wrote: > > This patch changes the way pgbench outputs its latency log files so that > > every transaction gets a timestamp and notes which transaction type was > > executed. It's a one-line change that just dumps some additional > > information that was already sitting in that area of code. I also made a > > couple of documentation corrections and clarifications on some of the more > > confusing features of pgbench. > > > > It's straightforward to parse log files in this format to analyze what > > happened during the test at a higher level than was possible with the > > original format. You can find some rough sample code to convert this > > latency format into CVS files and then into graphs at > > http://www.westnet.com/~gsmith/content/postgresql/pgbench.htm which I'll > > be expanding on once I get all my little patches sent in here. > > > > If you recall the earlier version of this patch I submitted, it added a > > cleanup feature that did a vacuum and checkpoint after the test was > > finished and reported two TPS results. The idea was to quantify how much > > of a hit the eventual table maintenance required to clean up after the > > test would take. While those things do influence results and cause some > > of the run-to-run variation in TPS (checkpoints are particularly visible > > in the graphs), after further testing I concluded running a VACUUM VERBOSE > > and CHECKPOINT in a script afterwards and analyzing the results was more > > useful than integrating something into pgbench itself. > > > > -- > > * Greg Smith [EMAIL PROTECTED] http://www.gregsmith.com Baltimore, MD > Content-Description: > > [ Attachment, skipping... ] > > > > > ---------------------------(end of broadcast)--------------------------- > > TIP 6: explain analyze is your friend > > -- > Bruce Momjian <[EMAIL PROTECTED]> http://momjian.us > EnterpriseDB http://www.enterprisedb.com > > + If your life is a hard drive, Christ can be your backup. + ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
