Hi, I'm running an older version of postfix and a 2.6.35 Linux kernel, and recently started seeing these messages:
Aug 14 19:52:01 smtp01 postfix/postsuper[2634]: fatal: setuid(103): Resource temporarily unavailable How can I troubleshoot this? I searched for this error and wasn't able to find anything recent or directly related, so I'm not sure where to look. Could this be a file allocation issue? This is on a relatively busy system with probably a hundred thousand messages per day, but seems to happen only a few hours after restarting the system. How can I determine how many open files the current postsuper process has? This error also appears with cleanup, smtp, and showq. The output from ulimit is this: # ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited file size (blocks, -f) unlimited max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 64923 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited I also tried increasing the open files to 2048, then restarting postfix in the same shell, but it still happens. Maybe it's a kernel compile-time variable, or some kernel tunable via sysctl? Thanks, Alex
