[SR-Users] out of shm without any visible reason

[Juha Heinanen]

Here is some more details about the shm usage.  Usage was steady at
about 10 MB until time 17:05.  Then it usage started to steadily grow
during 15 min period and 17:21 hit 80 MB at which point tm.clean was
executed.  After that usage dropped straight back to 10 MB level.

How is that possible, i.e,, why the expired transactions were not
automatically cleared?

According to tm README:

   An INVITE transaction will be kept in memory for maximum:
   max_inv_lifetime+fr_timer(from the ACK to the final reply
   wait)+wt_timer.

In this case the max memory time was 180 + 5 + 5 = 190 sec, which is
much less than 16 minutes.

-- Juha