| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Thalis A(dot) Kalfigopoulos" <thalis(at)cs(dot)pitt(dot)edu> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: shared_buffers revisited |
| Date: | 2001-07-20 22:23:26 |
| Message-ID: | 5453.995667806@sss.pgh.pa.us |
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| Lists: | pgsql-general |
"Thalis A. Kalfigopoulos" <thalis(at)cs(dot)pitt(dot)edu> writes:
> Another minor issue that has come to my attention is that when I define
> shared_buffers=40000
> I assume that it'll need a shm segment of 40000*8192=327680000 bytes
> And so I set /proc/sys/kernel/shmall and shmmax accordingly only to find out that postmaster failes to start because it requests a shmsegment of 336404480 bytes. Where is the fallacy in my math?
Shared buffers are not the only things we keep in shared memory ...
regards, tom lane
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