Re: Postgres Crash

Thanks Tom,

We don't have gdb.  We have mdb and pstack.  From the core:

[root@udrv] # mdb /opt/postgres/8.3-community/bin/postmaster /root/core
Loading modules: [ libc.so.1 ld.so.1 ]
> ::status
debugging core file of postmaster (32-bit) from udrv
file: /opt/postgres/8.3-community/bin/postmaster
initial argv: /opt/postgres/8.3-community/bin/postmaster -F
threading model: multi-threaded
status: process terminated by SIGSEGV (Segmentation Fault)
> ::regs
%cs = 0x003b            %eax = 0x083b7fe0
%ds = 0x0043            %ebx = 0x00000000
%ss = 0x0043            %ecx = 0x00000000
%es = 0x0043            %edx = 0x00000000
%fs = 0x0000            %esi = 0x00000001
%gs = 0x01c3            %edi = 0x00000005

 %eip = 0x081a8562 ConnCreate+0xb6
 %ebp = 0x08047c88
%kesp = 0x00000000

%eflags = 0x00010206
  id=0 vip=0 vif=0 ac=0 vm=0 rf=1 nt=0 iopl=0x0
  status=<of,df,IF,tf,sf,zf,af,PF,cf>

   %esp = 0x08047c78
%trapno = 0xe
   %err = 0x6

 [root@udrv] # pstack /root/core
core '/root/core' of 771:       /opt/postgres/8.3-community/bin/postmaster -F
 081a8562 ConnCreate (5) + b6
 081a791b ServerLoop (8047e68, 83b7930, 2, fead58be, 8047e68, 83c28b8) + db
 081a73f1 PostmasterMain (2, 83b7930) + ab5
 08164e3a main     (2, 8047e44, 8047e50) + 17a
 080891fa _start   (2, 8047ed0, 8047efb, 0, 8047efe, 8047f2e) + 7a
>

Sam

-----Original Message-----
From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
Sent: Friday, 10 December 2010 2:17 PM
To: Samuel Stearns
Cc: Shoaib Mir; pgsql-admin@postgresql.org
Subject: Re: [ADMIN] Postgres Crash

Samuel Stearns <SStearns@internode.com.au> writes:
> Tom, no useful messages in the log prior.  I do have a 47M core dump.  What should I do with that?

If you use gdb, try

    $ gdb /path/to/postmaster /path/to/corefile
    gdb> bt
    ... useful info here ...
    gdb> quit

I think the preferred debugger on Solaris might not be gdb, but if so
you'll need to consult its docs to find out how to get a stack trace.

            regards, tom lane