postgresql.conf shared buffers

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От km
Тема postgresql.conf shared buffers
Дата
Msg-id 20061003142042.GA2605@mrna.tn.nic.in
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Ответы Re: postgresql.conf shared buffers  ("Jim C. Nasby" <jim@nasby.net>)
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Hi all,

- What does the shared_buffers setting do ?
- Does it mean that that the postgres cannot access most of the physical RAM but limited to the memory setting
(shared_buffers)specified ? 
- How do i relate and set max_connections and shared_buffers?
- Is there a thumb rule to determine shared_buffers from max connections ?
- I see , by default max_connections set to 100 and shared_buffers to 1000 - does 1000 mean 1000 bytes or KB ?
- Also postgres will not start if the shared_buffers value exceeds the kernel setting of SHMMAX. do i need to recompile
thekernel to increase this value ? or is there any workaround ?  

tia,
regards,
KM

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