Greg Smith wrote:
> A.M. wrote:
> > Perhaps a simpler tool could run a basic fsyncs-per-second test and prompt the DBA to check that the numbers are
withinthe realm of possibility.
> >
>
> This is what the test_fsync utility that already ships with the database
> should be useful for. The way Bruce changed it to report numbers in
> commits/second for 9.0 makes it a lot easier to use for this purpose
> than it used to be. I think there's still some additional improvements
> that could be made there, but it's a tricky test to run accurately. The
test_fsync was designed to test various things like whether several
open-sync writes are better than two write and an fsync, and whether you
can fsync data written on a different file descriptor. It is really a
catch-all test right now, not one specific for choosing sync methods.
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.com
+ It's impossible for everything to be true. +