Hi, Last week we posted to the list for info about running Cyrus on 64-bit RHEL. But we also needed to ask a more direct question about caching, though, and didn't. So we are now... That q. is, does Cyrus actually benefit from large amounts of memory in an environment with just a few thousand users ( <1000 simultaneous sessions) and, say, up to 750GB of mail spool? Our plan is to throw 12-16GB at it, with the purpose of vastly increasing the FS buffer cache (and decreasing I/O). Or, will that just be a waste of RAM? Some indications are that, yes, it does improve performance notably: http://blog.fastmail.fm/2007/09/21/reiserfs-bugs-32-bit-vs-64-bit-kernels-cache-vs-inode-memory/ Anyone have any specific thoughts? Is there any other benefit we might see from large memory allocation in 64-bit architecture? Thanks, John Widera Oakton Community College Des Plaines and Skokie, IL ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
