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shared buffer cache monitoring

P: 1
I am using Postgres 8.1.4 on Linux. I am interested in calculating the following for a specific application:

How long it takes the operating system to fulfil a page demand, ie, reading the page from disk or from the OS cache to the Postgres shared buffer.

Also how long it takes the bgwriter to flush a page from the shared buffer into the OS cache or disk.

These can be averages or detailed info that I can analyze with other tools

Are there any functions/views available that log this information, if not where should I start in the source code.
Aug 8 '08 #1
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