On Tue, 20 Aug 2002, Perrin Harkins wrote: > Date: Tue, 20 Aug 2002 13:12:29 -0400 > From: Perrin Harkins <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > Cc: Dave Rolsky <[EMAIL PROTECTED]>, [EMAIL PROTECTED] > Subject: Re: Apache::Session - What goes in session? > > [EMAIL PROTECTED] wrote: > > We are investigating using IPC rather then a file based structure but > > its purely investigation at this point. > > > > What are the speed diffs between an IPC cache and a Berkely DB cache. My > > gut instinct always screams 'Stay Off The Disk' but my gut is not always > > right.. Ok, rarely right.. ;) > > Most of the shared memory modules are much slower than Berkeley DB. The > fastest option around is IPC::MM, but data you store in that does not > persist if you restart the server which is a problem for some. > BerkeleyDB (the new one, not DB_File) is also very fast, and other > options like Cache::Mmap and Cache::FileCache are much faster than > anything based on IPC::Sharelite and the like.
I wish some of these modules would be able to "touch" cached data so that it would expire cache entries on "last-accessed" rather than on the time the entries were created. Regards, Jie
