Public bug reported:
Binary package hint: postgresql-8.3
Freshly installed pgsql 8.3 on hardy got me this error when restarting:
2008-09-03 09:16:39 EDT DETAIL: Failed system call was shmget(key=5432001,
size=38207488, 03600).
2008-09-03 09:16:39 EDT HINT: This error usually means that PostgreSQL's
request for a shared memory segment exceeded your kernel's SHMMAX parameter.
You can either reduce the request size or reconfigure the kernel with larger
SHMMAX. To reduce the request size (currently 38207488 bytes), reduce
PostgreSQL's shared_buffers parameter (currently 4096) and/or its
max_connections parameter (currently 103).
If the request size is already small, it's possible that it is less
than your kernel's SHMMIN parameter, in which case raising the request size or
reconfiguring SHMMIN is called for.
The PostgreSQL documentation contains more information about shared
memory configuration.
Checking the kernel settings:
sudo sysctl -a | grep -i shm
kernel.shmmax = 33554432
kernel.shmall = 2097152
kernel.shmmni = 4096
The shared_buffers setting defaults to 32MB. I changed this down to 25MB
to test and then the server would start right up.
** Affects: postgresql-8.3 (Ubuntu)
Importance: Undecided
Status: New
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pgsql fails to start due to shared buffer setting greater than kernel allows
https://bugs.launchpad.net/bugs/264336
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