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? Regards, -- Satoshi Nagayasu <sn...@uptime.jp> Uptime Technologies, LLC. http://www.uptime.jp -- Sent via pgsql-docs mailing list (pgsql-docs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-docs
