Tom Lane wrote:
I took a look through the CVS history and verified that there were no post-8.4 commits that looked like they'd affect performance in this area. So I think it's got to be a platform difference not a PG version difference. In particular I think we are probably looking at a filesystem issue: how fast can you delete [...] 30000 files.
I'm still on Fedora 7, so maybe this will be motivation to upgrade. FYI, on my 8.2.13 system, the test created 30001 files which were all deleted during the commit. On my 8.4.0 system, the test created 60001 files, of which 30000 were deleted at commit and 30001 disappeared later (presumably during a checkpoint?).
But I'm not sure if the use-case is popular enough to deserve such a hack.
FWIW, the full app was looping over a set of datasets. On each iteration, it computed some intermediate results into a temp table, generated several reports from those intermediate results, and finally truncated the table for the next iteration. -- todd -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
