M. V. <bored_to_death85 <at> yahoo.com> writes: > > hi everyone, > > I have a 24/7 network server/gateway with FreeBSD-8.2 on a SSD drive. it's partitioned as normal (/ , /tmp, > /var , /usr and swap) for a long time now. But recently I heard from a FreeBSD expert that I shouldn't have > swap partition for my server, and having swap partition could make my server unstable. this was so strange > for me, and I searched a lot but couldn't find a reason for this claim. > > so my question is simple: > - could having a "swap" partition, be a bad thing for my FreeBSD server? and if so, why and in what conditions? > > Cheers!
Hi, I think your FB expert was up to something. I bet he spoke out of experience. Swapping by itself can decrease system reliability due to possible data corruption on swap disk or during two-way transfers, with subsequent incorrect RAM and machine crash. But, swapping is also a symptom, not a problem. It is never a good idea to let it get to that point. Badly written, architected, or tuned server app or system are the reason. Think of RDBMS/SQL server processing real-time on-line transactions and how much it goes into setting it up properly for a heavy use. On a smaller scale, consider this example: http://blog.jcole.us/2010/09/28/mysql-swap-insanity-and-the-numa-architecture/ jb _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
