Be careful with RH 8. 0 if you plan to use it on some heavy workload with some scripts...
Thanks, Hetz ---------- Forwarded Message ---------- Subject: Where'd the cpu cycles go ? Date: Monday 04 November 2002 13:30 From: Greg Hosler <[EMAIL PROTECTED]> Hi, I just came across a real performance bog in Red Hat 8.0 I noticed one of my sysadmin scripts going painfully slow, and running the cpu at 100%. upon some investigation, I noticed that a certain grep statement was choking the cpu. I've generated a shell script which duplicates that particular performance bog-down, but I can't pinpoint where the cpu's being hogged. The script generates a file (a.out) a little over a meg big, some 90000 lines, and then times a grep thru the file. running this same script on Red Hat 7.3, I see times of (on average) .07 seconds to run the grep. On Red Hat 8.0, the same grep takes over 6 and a half minutes (no joke!). (i.e. a 4000 times difference, from under a tenth of a second, to almost 400 seconds) My first thought was "what happened to grep", so I mounted my RH7.3 / partition on /mnt/root, and ran /mnt/root/bin/grep, and it also took the long path, so it's not grep. I ran a quick query in bugzilla (querying description and/or Summary for "performance", and didn't see anything related. Can anyone reproduce (or void) my results ? -Greg +---------------------------------------------------------------------+ You can release software that's good, software that's inexpensive, or software that's available on time. You can usually release software that has 2 of these 3 attributes -- but not all 3. | Greg Hosler [EMAIL PROTECTED] | +---------------------------------------------------------------------+ -------------------------------------------------------
grep_test
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