Patch applied. Thanks.
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Greg Smith wrote:
This patch adds the usage count statistic to the information available in
contrib/pgbuffercache. Earlier this month a discussion about my first
attempt to instrument the
Your patch has been added to the PostgreSQL unapplied patches list at:
http://momjian.postgresql.org/cgi-bin/pgpatches
It will be applied as soon as one of the PostgreSQL committers reviews
and approves it.
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This patch adds the usage count statistic to the information available in
contrib/pgbuffercache. Earlier this month a discussion about my first
attempt to instrument the background writer had Tom asking for details
about the usage histogram I was seeing, and this patch proved to be the
Possibly minor detail;
from buf_internals.h
uint16usage_count;/* usage counter for clock sweep code */
and you have a int16 to store that. Currently the max buffer count is
5. But is that a complete safe assumption? Maybe a compile time check
that BM_MAX_USAGE_COUNT is 16k
On Sun, 1 Apr 2007, Russell Smith wrote:
Currently the max buffer count is 5. But is that a complete safe
assumption? Maybe a compile time check that BM_MAX_USAGE_COUNT is 16k
would ensure that things don't go wrong?
I actually wasn't even aware that was a hard limit; I just assumed that
