Comments on: hanging on by a thread http://dossy.org/2004/09/hanging-on-by-a-thread/ Everything that comes out of Dossy, from the strange to the banal. Fri, 27 Jan 2012 14:30:11 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: weiqiong http://dossy.org/2004/09/hanging-on-by-a-thread/comment-page-1/#comment-56 weiqiong Tue, 21 Dec 2004 04:58:27 +0000 http://dossy.org/archives/000060.html#comment-56 I use tcl8.4.0 instead of tcl8.4.7, it's ok, haha...... I use tcl8.4.0 instead of tcl8.4.7, it’s ok, haha……

]]> By: weiqiong http://dossy.org/2004/09/hanging-on-by-a-thread/comment-page-1/#comment-55 weiqiong Mon, 13 Dec 2004 10:26:46 +0000 http://dossy.org/archives/000060.html#comment-55 I am not running OpenACS. Only I use "ab -n300 -c300 http://server/index.html", my server get a growing memory resident and after some spare time, nsd's resident memory did not resume yet. I use aolserver3.5.11 and tcl8.4.7, only request static html pages, the result is the same. What is the matter with aolserver or tcl?? I am not running OpenACS. Only I use “ab -n300 -c300 http://server/index.html“, my server get a growing memory resident and after some spare time, nsd’s resident memory did not resume yet. I use aolserver3.5.11 and tcl8.4.7, only request static html pages, the result is the same. What is the matter with aolserver or tcl??

]]> By: Dossy http://dossy.org/2004/09/hanging-on-by-a-thread/comment-page-1/#comment-54 Dossy Tue, 07 Dec 2004 14:32:10 +0000 http://dossy.org/archives/000060.html#comment-54 Definitely sounds like you have a memory leak somewhere. Are you running OpenACS or is everything code you wrote? Definitely sounds like you have a memory leak somewhere. Are you running OpenACS or is everything code you wrote?

]]> By: weiqiong http://dossy.org/2004/09/hanging-on-by-a-thread/comment-page-1/#comment-53 weiqiong Tue, 07 Dec 2004 11:08:02 +0000 http://dossy.org/archives/000060.html#comment-53 My aolserver has a core file everyday. Gdb's result is: (gdb) where #0 0x4017b801 in __kill () from /lib/i686/libc.so.6 #1 0x4011e61b in raise (sig=6) at signals.c:65 #2 0x4017cd82 in abort () at ../sysdeps/generic/abort.c:88 #3 0x400d3651 in Tcl_PanicVA () at eval.c:41 #4 0x400d3674 in Tcl_Panic () at eval.c:41 #5 0x40064e28 in NsThreadFatal () at eval.c:41 #6 0x40066e90 in NsCreateThread () at eval.c:41 #7 0x40065c3a in Ns_ThreadCreate () at eval.c:41 #8 0x4003e791 in SchedThread () at eval.c:41 #9 0x40065cd5 in NsThreadMain () at eval.c:41 #10 0x40067264 in ThreadMain () at eval.c:41 #11 0x4011bbfd in pthread_start_thread (arg=0x404cac00) at manager.c:262 There are 5 million requests to this aolserver 3.5.11 downloaded from sourceforge. Before create the core file, nsd use memory grow to 2G. The top result like this: PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND 20668 xmail 9 0 1292M 1.3G 2524 S 0.0 34.6 0:04 nsd 20669 xmail 9 0 1292M 1.3G 2524 S 0.0 34.6 0:07 nsd 20670 xmail 9 0 1292M 1.3G 2524 S 0.0 34.6 0:05 nsd 20671 xmail 9 0 1292M 1.3G 2524 S 0.0 34.6 0:04 nsd I think whether my so file has some memory leak or tcl thread library has. If a thread cleanuped, wether memory it used is all released?? Or this server pressure is too big, so cause this problem?? My aolserver has a core file everyday. Gdb’s result is:
(gdb) where
#0 0x4017b801 in __kill () from /lib/i686/libc.so.6
#1 0x4011e61b in raise (sig=6) at signals.c:65
#2 0x4017cd82 in abort () at ../sysdeps/generic/abort.c:88
#3 0x400d3651 in Tcl_PanicVA () at eval.c:41
#4 0x400d3674 in Tcl_Panic () at eval.c:41
#5 0x40064e28 in NsThreadFatal () at eval.c:41
#6 0x40066e90 in NsCreateThread () at eval.c:41
#7 0x40065c3a in Ns_ThreadCreate () at eval.c:41
#8 0x4003e791 in SchedThread () at eval.c:41
#9 0x40065cd5 in NsThreadMain () at eval.c:41
#10 0×40067264 in ThreadMain () at eval.c:41
#11 0x4011bbfd in pthread_start_thread (arg=0x404cac00) at manager.c:262

There are 5 million requests to this aolserver 3.5.11 downloaded from sourceforge. Before create the core file, nsd use memory grow to 2G. The top result like this:

PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
20668 xmail 9 0 1292M 1.3G 2524 S 0.0 34.6 0:04 nsd
20669 xmail 9 0 1292M 1.3G 2524 S 0.0 34.6 0:07 nsd
20670 xmail 9 0 1292M 1.3G 2524 S 0.0 34.6 0:05 nsd
20671 xmail 9 0 1292M 1.3G 2524 S 0.0 34.6 0:04 nsd

I think whether my so file has some memory leak or tcl thread library has. If a thread cleanuped, wether memory it used is all released??

Or this server pressure is too big, so cause this problem??

]]> By: Dossy http://dossy.org/2004/09/hanging-on-by-a-thread/comment-page-1/#comment-52 Dossy Wed, 01 Dec 2004 14:26:27 +0000 http://dossy.org/archives/000060.html#comment-52 If you're using a modern kernel (I'm using a 2.6 kernel on Debian Linux) you can set Linux's maxthreads: <blockquote> # sysctl kernel.threads-max<br /> kernel.threads-max = 16383 </blockquote> AOLserver's maxthreads ought to be limited by the OS's thread max limit, sure. But, if you can raise the OS limit, AOLserver should be able to grow with it. If you’re using a modern kernel (I’m using a 2.6 kernel on Debian Linux) you can set Linux’s maxthreads:

# sysctl kernel.threads-max
kernel.threads-max = 16383

AOLserver’s maxthreads ought to be limited by the OS’s thread max limit, sure. But, if you can raise the OS limit, AOLserver should be able to grow with it.

]]> By: weiqiong http://dossy.org/2004/09/hanging-on-by-a-thread/comment-page-1/#comment-51 weiqiong Wed, 01 Dec 2004 10:33:27 +0000 http://dossy.org/archives/000060.html#comment-51 I want to ask you a question: is the maxthread of aolserver limited by linux's maxthread 256 limit? Can I set maxthread to 800?Thanks. I want to ask you a question: is the maxthread of aolserver limited by linux’s maxthread 256 limit? Can I set maxthread to 800?Thanks.

]]> By: weiqiong http://dossy.org/2004/09/hanging-on-by-a-thread/comment-page-1/#comment-50 weiqiong Mon, 15 Nov 2004 02:03:22 +0000 http://dossy.org/archives/000060.html#comment-50 On RedHatlinux7.1 and kernel2.4.23, though I try so much method, there is no core file yet when aolserver down if it has started up using /etc/inittab. Then, I try it on RedHat Fedora core 2 and kernel2.6.5, it's ok, haha...... I think the core files have something related to platform and kernel version. On RedHatlinux7.1 and kernel2.4.23, though I try so much method, there is no core file yet when aolserver down if it has started up using /etc/inittab. Then, I try it on RedHat Fedora core 2 and kernel2.6.5, it’s ok, haha……
I think the core files have something related to platform and kernel version.

]]> By: Dossy http://dossy.org/2004/09/hanging-on-by-a-thread/comment-page-1/#comment-49 Dossy Fri, 12 Nov 2004 14:21:33 +0000 http://dossy.org/archives/000060.html#comment-49 You might want to try something like this in your /etc/inittab: <blockquote>wm:235:respawn:/bin/sh -c "ulimit -c unlimited; /usr/local/aolserver/bin/nsd -it /usr/local/aolserver/sample-config.tcl -u xmail -g xmail"</blockquote> If this doesn't work, then your problem may be something else: the "xmail" user may not have permission to write the corefile -- make sure directory permissions are correct under /usr/local/aolserver so that the "xmail" user can write its corefile there. You might want to try something like this in your /etc/inittab:

wm:235:respawn:/bin/sh -c “ulimit -c unlimited; /usr/local/aolserver/bin/nsd -it /usr/local/aolserver/sample-config.tcl -u xmail -g xmail”

If this doesn’t work, then your problem may be something else: the “xmail” user may not have permission to write the corefile — make sure directory permissions are correct under /usr/local/aolserver so that the “xmail” user can write its corefile there.

]]> By: weiqiong http://dossy.org/2004/09/hanging-on-by-a-thread/comment-page-1/#comment-48 weiqiong Fri, 12 Nov 2004 09:36:37 +0000 http://dossy.org/archives/000060.html#comment-48 Today, I start aolserver(added prctl call) through putting "./bin/nsd -t ./sample-config.tcl -u xmail" on console, I can get core file when it down, how kind you are. But, if I start aolserver through adding line "wm:235:respawn:/usr/local/aolserver/bin/nsd -it /usr/local/aolserver/sample-config.tcl -u xmail -g xmail" in file /etc/inittab, I find no core file when it down. How can I get core file in this auto start-up mode? It runs on Redhatlinux7.1 and kernel2.4.23. Today, I start aolserver(added prctl call) through putting “./bin/nsd -t ./sample-config.tcl -u xmail” on console, I can get core file when it down, how kind you are. But, if I start aolserver through adding line “wm:235:respawn:/usr/local/aolserver/bin/nsd -it /usr/local/aolserver/sample-config.tcl -u xmail -g xmail” in file /etc/inittab, I find no core file when it down. How can I get core file in this auto start-up mode?
It runs on Redhatlinux7.1 and kernel2.4.23.

]]> By: Dossy http://dossy.org/2004/09/hanging-on-by-a-thread/comment-page-1/#comment-47 Dossy Thu, 11 Nov 2004 14:12:49 +0000 http://dossy.org/archives/000060.html#comment-47 Line 398 in nsd/nsmain.c rev 1.59. Line 398 in nsd/nsmain.c rev 1.59.

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