Today I noticed that the log was filling up with:

[2005-12-03 06:29:47 UTC] LOG:  could not load root certificate file
+"/var/lib/postgresql/8.0/main/root.crt": No SSL error reported
[2005-12-03 06:29:47 UTC] DETAIL:  Will not verify client certificates.
[2005-12-03 06:29:47 UTC] FATAL:  lock file
+"/var/lib/postgresql/8.0/main/postmaster.pid" already exists
[2005-12-03 06:29:47 UTC] HINT:  Is another postmaster (PID 288) running
in data
+directory "/var/lib/postgresql/8.0/main"?

I got 1 per second!  A few megabytes later, I killed everything and
restart.  Looks OK now, but how to avoid this in the future?

Do I need a ./finish script which does:

  kill `cat /var/lib/postgresql/8.0/main/postmaster.pid`

??

Suggestions please.  ;-)