I rather doubt anyone has tested any of these timings. I've not seen anything published, anyway. I suggest running them yourself to see what's fastest. I have noticed that (at least on FreeBSD), a seperate bzip2/gzip doesn't utilize a second CPU, which is odd. But it's been a long time since I've looked at this kind of thing. If you do run tests, please share your findings with the community (pgsql-general or -performance might be more appropriate than -admin). On Wed, Oct 12, 2005 at 09:36:07AM -0400, Chris Hoover wrote: > I'm wondering, does anyone know of any timing tests for pg_dump? > > I am trying to find the fastest way to do our nightly database backups using > pg_dump. And I just wanted to make sure I don't reinvent the wheel if > someone has already done a bunch of comparisions with the various ways to > backup. > > Here are the kind of timings I'm looking at: > > pg_dump -Fc -Zx > pg_dump -Fc > pg_dump -Ft > pg_dump > pg_dump -Fc | gzip > backup > pg_dump -Ft | gzip > backup > pg_dump | gzip > backup > pg_dump -Fc | bzip2 > backup > pg_dump -Ft | bzip2 > backup > pg_dump | bzip2 > backup > > I know there are many variables, but I'm just looking at the pg_dump > process. Does anyone know what the fastest pg_dump would be? > > Also, what -Z compression level equals the compression of gzip? I've played > with -Z9, but it seems to compress better than gzip (but takes a bit > longer). > > Thanks, > > Chris -- Jim C. Nasby, Sr. Engineering Consultant jnasby@xxxxxxxxxxxxx Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461 ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
