On Wed, May 22, 2013 at 6:14 AM, Albe Laurenz <laurenz.a...@wien.gv.at>wrote:
> Rodrigo Barboza wrote: > > I have a doubt. > > I have a 32-bit postrgesql running with 2.5gb of shared_buffer. > > And I have maintenance_work_mem = 1gb and autovacuum_max_workers = 3. > > How maintenance_work_mem is related to shared_buffer? > > If the 3 workers uses 1gb, will the database crash? > > Or their memory usage are separated from each other? > > Your doubt is quite in place, as a process on a 32-bit architecture > cannot address more than 4GB of memory. > > See http://rhaas.blogspot.jp/2011/05/sharedbuffers-on-32-bit-systems.html > > shared_buffers plus the private memory of a backend shouldn't > exceed 3GB. > > So I'd go for shared_buffers = 2GB and maintenance_work_mem much > smaller than 1GB. > > Yours, > Laurenz Albe > Perfect. Thanks, guys!
