On Tue, Oct 20, 2009 at 4:22 PM, Waldomiro <waldom...@shx.com.br> wrote:
> Hi everybody, > > I have some doubts about sharedmemory and work_mem. > > I have a server: > > 64 GB RAM > 2 processors 4 cores each one intel xeon 3 Ghz > expecting 300 users in the same time > > So, I put in sharedbuffers the same size my two biggest tables, which are > the most read too. 11 GB + 4 GB. total shared buffers = 15 GB > > After that I put 100 MB to each expected user, 300 * 100 MB = 30 GB > > So, I used only 30 GB + 15GB = 45 GB total RAM > > My doubt is, can I use more RAM for shared buffers? about 30 GB (50% of > total RAM)? > > What is the max shared buffers I can use? How can I calculate that? > > what's the db version? what OS ? have you tried pgtune ? (if db 8.3 or 8.4) -- GJ
