Thanks, Bruce!
2013/07/04 3:26, Bruce Momjian wrote:
On Wed, Jul 3, 2013 at 02:23:11PM -0400, Bruce Momjian wrote:
On Sat, Nov 24, 2012 at 11:57:51AM +0900, Satoshi Nagayasu wrote:
Hi,
I found that the manual page for pg_buffercache module explains
"usagecount" as "Page LRU count".
http://www.postgresql.org/docs/devel/static/pgbuffercache.html
However, AFAIK, "usagecount" is not a LRU count nowadays, because
LRU is no longer used for the buffer management algorithm.
I think it should be described as "Clock-sweep count" or something
like that.
And I'd like to add some additional explanation for the "forknumber"
as below:
"0 for heap file, 1 for FreeSpaceMap, and 2 for VisibilityMap".
Any comments?
Good suggestion. I ended up referencing the C file that contains the
"forknumber" definitions, rather than recreating the list in the docs.
I applied the attached patch to head and 9.3.
I ended up applying it to 9.2 as well.
--
Satoshi Nagayasu <sn...@uptime.jp>
Uptime Technologies, LLC. http://www.uptime.jp
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