Date: Tue, 12 Dec 2000 14:46:37 -0800 (PST) From: Matt Dillon <dillon@earth.backplane.com> To: Kachun Lee <kachun@pathlink.com>, freebsd-stable@FreeBSD.ORG Subject: Re: Extreme high load with 12/7 4-releng Message-ID: <200012122246.eBCMkb953654@earth.backplane.com> References: <200012120230.SAA32402@pathlink.net> <200012121801.KAA42878@pathlink.net> <200012122138.NAA69074@pathlink.net> <200012122231.eBCMVE353411@earth.backplane.com>
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::Sorry to say, the system performance degraded with the high load. In
::telnet, it felt like a system with load of 40. With the 'working' FreeBSD,
::the servers would still performance better (load >10) with twice the
::connections. I still suspect that it was related to the server start to
::swap heavily even with 200+M of Inact memory? The strange part was the swap
::Used stayed relatively low (>20M), but, with top, the swap In and Out
::changed every refresh.
::
::Regards
::
::Best regards
:
: That is very odd. Very very odd. Do a 'systat -vm 1' and let it run
: a while... observe the pagein and pageout statis in the upper right
: for 'VN PAGER' and 'SWAP PAGER' and tell me what you see.
:
: -Matt
I think I have an idea as to what might be wrong. I'm going to
experiment a bit over the next few days to try to solve the problem.
I think my low-memory patch might have blown the pageout algorithm.
-Matt
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