Date: Mon, 18 Jun 2001 13:44:23 -0700 From: Rick <rick@geckobot.com> To: freebsd-questions@FreeBSD.ORG Subject: Significant Performance Drop during 4.0-4.3 Upgrade Message-ID: <01061813442301.17965@trap.geckobot.com>
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Hi! I just upgraded 3 servers from 4.0 to 4.3 FreeBSD using sysinstall, and I noticed that some rm -r operations seemed a little slow after the upgrade. Coincidentally I've been working on an ISAM alternative to B-tree so I have a bunch of performance benchmarks handy. The results: Disk hits are *much* slower after the upgrade. Many times slower, in fact. I also had Berkley DB benchmarks that I was using for comparison and they too were heavily impacted. For the life of me, I can't figure out what the heck happened! SOFTUPDATES were off before the upgrade and I didn't change of the disk tuning. I did tweak my kernel a bit, but nothing should have had this effect-- I just removed a few things that weren't being used like EISA and some network cards. When I examine dmesg everything still seems to be recognized as ULTRA DMA, etc. I've tried putting everything back in my kernel and I've try the GENERIC kernel with no improvements. I've looked through the release notes, etc., and couldn't find anythingd etailing this problem. Did I miss something? Am I just extra lucky? Thanks in advance, Rick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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