cpu and cyrus

[Dan White]

On 01/09/11 10:14 -0700, Maria McKinley wrote:
>> On 8/31/11 1:09 PM, Bron Gondwana wrote:
>>> Ok - next time it goes crazy can you pick one up with gdb and get
>>> a backtrace?
>>>
>>> gdb $cyrusbinpath/imapd $pid
>>>
>>> and then when you get the prompt:
>>>
>>> bt
>>>
>>> and maybe also:
>>>
>>> p imapd_in
>>>
>>> which will give us the command that's running.
>>>
>
>ella:~# gdb /usr/lib/cyrus/bin/imapd 4416

>(gdb) bt
>#0  0x00007f2c049e90d8 in poll () from /lib/libc.so.6
>#1  0x00007f2bfe6fd31d in ?? () from /usr/lib/libldap_r-2.4.so.2
>#2  0x00007f2bfe6fe4fd in ldap_result () from /usr/lib/libldap_r-2.4.so.2
>#3  0x00007f2bfe93a505 in ?? () from /lib/libnss_ldap.so.2
>#4  0x00007f2bfe93a7a7 in ?? () from /lib/libnss_ldap.so.2
>#5  0x00007f2bfe93cff5 in _nss_ldap_endgrent () from /lib/libnss_ldap.so.2
>#6  0x00007f2c04a04d89 in ?? () from /lib/libc.so.6
>#7  0x00007f2c049c315a in endgrent () from /lib/libc.so.6
>#8  0x0000000000451d1d in ?? ()
>#9  0x000000000043c008 in ?? ()
>#10 0x0000000000414de1 in ?? ()
>#11 0x00007f2c069cb682 in do_authorization (s_conn=0x26852f0) at
>server.c:1185
>#12 0x00007f2c069cc22d in sasl_checkpass (conn=0x26852f0, user=<value
>optimized out>, userlen=4,
>     pass=0x2686fe0 "Biko';l", passlen=7) at server.c:1746
>#13 0x0000000000414783 in ?? ()
>#14 0x000000000041892a in ?? ()
>#15 0x000000000041a3e4 in ?? ()
>#16 0x0000000000407b07 in ?? ()
>#17 0x00007f2c04943c4d in __libc_start_main () from /lib/libc.so.6
>#18 0x0000000000407229 in ?? ()
>#19 0x00007fffd439b798 in ?? ()
>#20 0x000000000000001c in ?? ()
>#21 0x0000000000000004 in ?? ()
>#22 0x00007fffd439be5f in ?? ()
>#23 0x00007fffd439be65 in ?? ()
>#24 0x00007fffd439be68 in ?? ()
>#25 0x00007fffd439be6b in ?? ()
>#26 0x0000000000000000 in ?? ()
>(gdb) p imapd_in
>$1 = 40607904
>(gdb)
>----

Do you use any group ACLs? It looks like your imapd process may be waiting
for a group list enumeration to complete, via an nss ldap plugin.

If so, and you are using the default 'auth_mech: unix' group authorization
config, this is not a recommended configuration per:

http://www.cyrusimap.org/docs/cyrus-imapd/2.4.10/overview.php#aclauth

Doing so can cause performance issues.

-- 
Dan White