> FWIW, EnterpriseDB's "InfiniCache" provides the same caching benefit. The way that works is when PG goes to evict a
pagefrom shared buffers that page gets compressed and stuffed into a memcache cluster. When PG determines that a given
pageisn't in shared buffers it will then check that memcache cluster before reading the page from disk. This allows you
tocache amounts of data that far exceed the amount of memory you could put in a physical server.
So memcached basically replaces the filesystem?
That sounds cool, but I'm wondering if it's actually a performance
speedup. Seems like it would only be a benefit for single-row lookups;
any large reads would be a mess.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com
