When starting symux (installed from packages), I run out of semaphores (see
output below).
I searched the archives, and found a post from Marco Pfatschbacher that
included a patch to symon that reduced SYMUX_SHARESLOTS from 20 to 3.
I'm curious as why am I running out of semaphores--don't I have slots for 60
semaphores?
20 symux (guess)
4 ipcs (see below)
---
24
24 < kern.seminfo.semmns, which is 60.
If it matters, this is a GENERIC 4.1 kernel, rebuilt with profiling on.
Please CC me, as I'm not subscribed.
Thanks,
m
# symux -d
symux version 2.75
program id=30174
debug: size of churnbuffer = 902
debug: shm from 0x8395a000 to 0x83af1430
fatal: could not get a semaphore
# ipcs
Message Queues:
T ID KEY MODE OWNER GROUP
Shared Memory:
T ID KEY MODE OWNER GROUP
m 65536 5432001 --rw------- _postgresql _postgresql
Semaphores:
T ID KEY MODE OWNER GROUP
s 327680 0 --rw------- www www
s 65537 5432001 --rw------- _postgresql _postgresql
s 65538 5432002 --rw------- _postgresql _postgresql
s 65539 5432003 --rw------- _postgresql _postgresql
# sysctl -a | grep seminfo
kern.seminfo.semmni=10
kern.seminfo.semmns=60
kern.seminfo.semmnu=30
kern.seminfo.semmsl=60
kern.seminfo.semopm=100
kern.seminfo.semume=10
kern.seminfo.semusz=100
kern.seminfo.semvmx=32767
kern.seminfo.semaem=16384
#
