On Fri, 23 Apr 2004, Manfred Koizar wrote: > > Setting shared_buffers to half your available memory is the worst thing > you can do. You would end up caching exactly the same set of blocks in > the internal buffers and in the OS cache, thus effectively making one of > the caches useless.
One minor detail... You wouldn't really cache the _exact_ same blocks because cache-hits in shared-buffers (on the most frequently accessed pages) would let the OS cache some other pages in it's cache. But in my experience Manfred's right that there's no benefit and some penalty to making shared_buffers so large it takes a significant piece away from the OS's caching. ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
