more info on "libthread panic: _sys_thread_create():alloc_thread" message

  The system is a Sun U5 running Solaris 2.6 and Squid 2.2S5; it has 512 MB
RAM and is doing approximately 25 reqs / second. squid is built with
asyncio turned on. sar -r does not indicate any significant drop in
available system memory:

11:45:00 1234 1947742
12:00:01 1280 1949016
12:15:00 1177 1947806
12:30:01 1166 1948487
12:45:01 1251 1947080
13:00:01 1122 1945463
13:15:06 1250 1943471
13:30:00 1158 1946548
13:45:09 1292 1945131
14:00:01 1171 1944605
14:15:01 1148 1946769
14:30:01 1167 1945919
14:45:00 1230 1944514
15:00:01 1251 1947210
15:15:00 1260 1945546
15:30:00 1296 1946010
15:45:00 1206 1847972
16:00:01 3166 1759425

This machine, however, produced the following error around 15:40:

libthread panic: _sys_thread_create():alloc_thread returns 0 (no mem) (PID:
1642
1 LWP 1)
stacktrace:
        ef5d3140
        ef54ff28
        ef54fa80
        31f34
        2e740
        3108c
        312ac
        31a48
        4d27c
        1aab4
        0

Looking through the FAQ, there was mention of a memory leak in dlmalloc so I
tried to build using Sun's native malloc; this seemed to exacerbate the
problem - the errors were coming fast and furious, probably every two or
three hours. It took approximately three days for this problem to recur
with dlmalloc compiled back in.

  Any ideas from the group?
  
  Thanks.

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Received on Fri Oct 08 1999 - 10:48:15 MDT