Re: [PERFORM] pg_dump and thousands of schemas

2012-05-28 Thread Hugo
Thanks again for the hard work, guys. When I said that the schemas were empty, I was talking about data, not tables. So you are right that each schema has ~20 tables (plus indices, sequences, etc.), but pretty much no data (maybe one or two rows at most). Data doesn't seem to be so important in th

Re: [PERFORM] pg_dump and thousands of schemas

2012-05-28 Thread Tom Lane
Jeff Janes writes: > There is a quadratic behavior in pg_dump's "mark_create_done". This > should probably be fixed, but in the mean time it can be circumvented > by using -Fc rather than -Fp for the dump format. Doing that removed > 17 minutes from the run time. Hmm, that would just amount to

Re: [PERFORM] pg_dump and thousands of schemas

2012-05-28 Thread Jeff Janes
On Sat, May 26, 2012 at 9:12 PM, Hugo wrote: > Here is a sample dump that takes a long time to be written by pg_dump: > http://postgresql.1045698.n5.nabble.com/file/n5710183/test.dump.tar.gz > test.dump.tar.gz > (the file above has 2.4Mb, the dump itself has 66Mb) > > This database has 2,311 sche

[PERFORM] Recover rows deleted

2012-05-28 Thread Alejandro Carrillo
Hi, ¿How I can recover a row delete of a table that wasn't vacuummed? I have PostgreSQL 9.1 in Windows XP/7. Thanks

Re: [PERFORM] SSD selection

2012-05-28 Thread Greg Smith
On 05/16/2012 01:01 PM, Merlin Moncure wrote: Although your assertion 100% supported by intel's marketing numbers, there are some contradicting numbers out there that show the drives offering pretty similar performance. For example, look here: http://www.anandtech.com/show/4902/intel-ssd-710-200