[Dovecot] dovecot/lmtp munmap()-ing a lot

8 Jun 2014


      I observed several long running dovecot/lmtp processes hogging the
CPU. I then strace'd them (strace -c -p 6375) and found them
munmap()-ing a lot:
% time     seconds  usecs/call     calls    errors syscall

97.18   19.592537        1878     10430           munmap
2.28    0.458984          36     12696           epoll_ctl
0.26    0.052926          10      5288           fdatasync
0.21    0.042472           3     13679           epoll_wait
... snip ...
Why would that happen? (dovecot 2.1.17)
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[Dovecot] dovecot/lmtp munmap()-ing a lot

Ralf Hildebrandt