Date: Sat, 5 Mar 2005 11:58:08 -0500 From: Vlad <marchenko@gmail.com> To: Phil Brennan <phil.brennan@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: performance under heavy load Message-ID: <cd70c68105030508583168a727@mail.gmail.com> In-Reply-To: <ff0f76e00503050828481e6462@mail.gmail.com> References: <ff0f76e00503050828481e6462@mail.gmail.com>
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> On a highly linux machine, you lose all control of the machine past a load of about 6 - 10. to be fair, I should note that as admin / user of few tens of servers running both systems, I can assure you that if your linux "loses control" with LA ~ 10, then something is seriously wrong with that server and it's not because of the linux (rather it's hardware or wrong kernel configuration). I had cases of LA climbing over 150 on linux machine - it was extremely slow but I could get it back to life w/o need for reboot. On Sat, 5 Mar 2005 16:28:09 +0000, Phil Brennan <phil.brennan@gmail.com> wrote: > 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 > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > -- Vlad
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