Messages in this thread | | | From | "Nicholas J. Leon" <> | Date | Sat, 4 Apr 1998 00:29:57 -0500 (EST) | Subject | 2.1.92 high-load report |
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'Folks -
I've been following the stream of messages concerning swapping and performance under the new kernel and I'd like to relate an experience I had today.
Apparently I pissed someone off recently and they decided to take it out against my webserver. So, I had several hundreds of bad requests sent to my Apache 1.3.x server per second.
I noticed something was wrong when sendmail started refusing connections, so I logged in and checked it out. All 150 slots of httpd were taken up, they were all running. The load average was <drum roll> 257!! I've **NEVER** seen my box so high. Not only that, but it was fairly responsive (much more than I expected). Keystrokes were echoed back in a second, commands didn't take too long to lookup and execute.
It was quite impressive. I killed httpd, ipfw'd the attacker and restarted httpd. No problems. Didn't even have to reboot the machine.
Linux 2.1.92 (root@madi) (gcc 2.8.1) #1 Thu Apr 2 16:03:39 EST 1998 [madi]
Memory: Total Used Free Shared Buffers Cached Mem: 39200 29196 10004 31216 12288 6444 Swap: 110876 0 110876
Pentium 100, couple o' WD ide drives. Old FX mobo.
Anyway, just wanted relay that ... g'nite!
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simple is elegant mrnick.binary9.net nicholas@binary9.net ___________________________________________________________________________
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