Date: Sat, 5 Mar 2005 16:28:09 +0000 From: Phil Brennan <phil.brennan@gmail.com> To: freebsd-stable@freebsd.org Subject: performance under heavy load Message-ID: <ff0f76e00503050828481e6462@mail.gmail.com>
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Hi, I'd just like to give some credit to the freebsd developers for a job well done. A user on our system ( freebsd 5.2.1 smp ) managed with a runaway script to start up 500 intensive processes, raising the load average to about 200. We managed to remotely, over ssh get a somewhat responsive session and kill the offending processes. Yes, I know we shouldn't have let it happen in the first place, by putting in proper user limits and all that, but it was amazing that the machine still worked. We thought we'd have to reboot. Even with a load of nearly 200, the machine was still able to serve web pages :) Once the load came down past 60, the system feltl fully responsive again. On linux, we would have had to reboot in this situation. On a highly linux machine, you lose all control of the machine past a load of about 6 - 10. This just further vindicates my decision to use freebsd for this service. ( Its a shell server with about 100 active users, apache, nfs, mysql, ldap ). Just wanted to share a success story :) Regards, Philip Brennan
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