Note - try to cc: the mailing list, I don't always read this inbox
Gauri Kanekar wrote:
On 2/26/07, Richard Huxton <dev@xxxxxxxxxxxx> wrote:
Gauri Kanekar wrote:
> Hi List,
>
> Machine was down due to some hardware problem.
>
> After then when i issue this command /usr/local/pgsql/bin/psql -l
> its giving me the following error
>
> psql: could not connect to server: No such file or directory
> Is the server running locally and accepting
> connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
>
> Can anybody tell me what going wrong??
Well, it's either looking in the wrong place or the server isn't
actually running.
1. Do your startup scripts start PG?
Yes
OK - so we know it should have started, which means the logs should say
something about our problem.
2. Is there a server process? "ps auxw | grep postgres"
This is the result given by the command
root 8907 0.0 0.1 37496 2640 ? Ss 03:47 0:00 sshd:
postgres [priv]
postgres 8910 0.0 0.0 37636 1684 ? S 03:47 0:00 sshd:
postgres@pts/1
postgres 8911 0.0 0.1 10152 2564 pts/1 Ss+ 03:47 0:00 -bash
root 9470 0.0 0.1 37500 2644 ? Ss 04:28 0:00 sshd:
postgres [priv]
postgres 9473 0.0 0.0 37640 1688 ? S 04:28 0:00 sshd:
postgres@pts/2
postgres 9474 0.0 0.1 10104 2412 pts/2 Ss 04:28 0:00 -bash
postgres 9724 0.0 0.0 3496 892 pts/2 R+ 04:44 0:00 ps auxw
postgres 9725 0.0 0.0 3868 784 pts/2 R+ 04:44 0:00 grep
postgres
Hmm - nothing there but "ssh" connections. So, it's not started, which
is why psql is complaining.
3. What do your logfiles say?
HINT: In a moment you should be able to reconnect to the database and
repeat your command.
LOG: database system was interrupted at 2007-02-23 20:14:24 IST
LOG: could not open file "pg_xlog/00000001000000390000001A" (log file 57,
segment 26): No such file or directory
LOG: invalid primary checkpoint record
LOG: could not open file "pg_xlog/000000010000003900000017" (log file 57,
segment 23): No such file or directory
LOG: invalid secondary checkpoint record
PANIC: could not locate a valid checkpoint record
LOG: startup process (PID 9057) was terminated by signal 6
LOG: aborting startup due to startup process failure
FATAL: pre-existing shared memory block (key 5432001, ID 1900546) is still
in use
HINT: If you're sure there are no old server processes still running,
remove the shared memory block with the command "ipcclean", "ipcrm", or
just
delete the file "postmaster.pid".
OK - this last bit is the first thing to deal with. Find your
postmaster.pid file and delete it. Your postmaster.pid file should be in
your data directory - try "locate postmaster.pid" or "find /usr/local/
-name postmaster.pid".
Then restart postgresql (as root "/etc/init.d/postgresql start" or
similar) and check the logs again.
--
Richard Huxton
Archonet Ltd
