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SHMMAX and SHMALL question - Mailing list pgsql-general
From
DM
Subject
SHMMAX and SHMALL question
Date
January 22, 2011
00:35:06
Msg-id
AANLkTimYwdqdvAPDSgMME4Vz=wRaLP9cP1NUZX3iTTF5@mail.gmail.com
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Re: SHMMAX and SHMALL question
Re: SHMMAX and SHMALL question
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Firstof all sorry for posting linux kernel question in pgsql-general, but i am trying to figure out what value to set for postgresql db server.
RAM = 16GB, what value should i set for shmall?
If i set shmall to 4294967296 (4GB), current PAGE_SIZE is 4096 should i need to set my shmmax = 4294967296*4096 = 17592186044416?
cat /proc/sys/kernel/shmall
4294967296
getconf PAGE_SIZE
4096
Current Shmmax -
==> cat /proc/sys/kernel/shmmax
68719476736
should i need to increase my shmmax to
17592186044416?
also what value should i need to set shmall?
what happens if i set shmmax to lower than the expected size?
Thanks
Deepak
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