Re: TNS-12500: TNS:listener failed to start a dedicated server process

From: Steve Howard <stevedhoward_at_gmail.com>
Date: Thu, 8 Jan 2009 12:22:51 -0800 (PST)
Message-ID: <eaeb4d48-279e-4dcd-94df-d5f983110364_at_i18g2000prf.googlegroups.com>

On Jan 8, 2:26 pm, shweta.kapar..._at_googlemail.com wrote:
> On Jan 8, 2:34 pm, Steve Howard <stevedhow..._at_gmail.com> wrote:
>
>
>
> > On Jan 8, 9:29 am, shweta.kapar..._at_googlemail.com wrote:
>
> > > On Jan 8, 1:59 pm, Steve Howard <stevedhow..._at_gmail.com> wrote:
>
> > > > On Jan 8, 8:57 am, shweta.kapar..._at_googlemail.com wrote:
>
> > > > > Hi All
>
> > > > > We are badly being hit by the following error:
>
> > > > > 08-JAN-2009 12:43:05 * (connect_data=(server=dedicated)
> > > > > (service_name=XX)(INSTANCE_ROLE=primary)(failover_mode=(type=session)
> > > > > (method=basic)(backup=YY)(retries=180)(delay=5))(CID=(PROGRAM=oracle)
> > > > > (HOST=ZZ)(USER=oracle))(INSTANCE_NAME=AAAA)) * (ADDRESS=(PROTOCOL=tcp)
> > > > > (HOST=<IP>)(PORT=<PORT>)) * establish * BB * 12500
> > > > > TNS-12500: TNS:listener failed to start a dedicated server process
> > > > >  TNS-12540: TNS:internal limit restriction exceeded
> > > > >   TNS-12560: TNS:protocol adapter error
> > > > >    TNS-00510: Internal limit restriction exceeded
> > > > >     HPUX Error: 11: Resource temporarily unavailable
>
> > > > > This is repeating at the following interval. ( as a sample.).. It is
> > > > > intermittent.
>
> > > > > Start                    End
> > > > > 08/01/2009 12:40:03     08/01/2009 12:40:13
> > > > > 08/01/2009 12:41:03     08/01/2009 12:41:04
> > > > > 08/01/2009 12:42:04     08/01/2009 12:42:04
> > > > > 08/01/2009 12:43:04     08/01/2009 12:43:04
> > > > > 08/01/2009 12:43:05     08/01/2009 12:43:05
>
> > > > > In between above intervals connections are successful
>
> > > > > We are using "dedicated Server" connection.
>
> > > > > CPU /Mem utlisation is normal. No change seen in the pattern.
>
> > > > > Regards
>
> > > > > Shweta.
>
> > > > Hi Shweta,
>
> > > > How do your OS kernel parameter limits look, i.e. open files, max
> > > > processes, etc.?
>
> > > > Regards,
>
> > > > Steve- Hide quoted text -
>
> > > > - Show quoted text -
>
> > > Hi Steve
>
> > > We have 05 databases running in Host -A
>
> > > I have taken below o/p  from 1st database. We ra facing this issue in
> > > all the databases almost at the same time.
>
> > > SQL>select * from v$resource_limit;
>
> > > RESOURCE_NAME                  CURRENT_UTILIZATION MAX_UTILIZATION
> > > INITIAL_AL  LIMIT_VALU
> > > ------------------------------ ------------------- ---------------
> > > ---------- ----------
> > > processes                                      135
> > > 256       1000       1000
> > > sessions                                       134
> > > 252       1105       1105
> > > enqueue_locks                                   72
> > > 361      14154      14154
> > > enqueue_resources                               72
> > > 72      50000  UNLIMITED
> > > ges_procs                                      133
> > > 253       1001       1001
> > > ges_ress                                     37791
> > > 50079      90367  UNLIMITED
> > > ges_locks                                    28140
> > > 42011      96306  UNLIMITED
> > > ges_cache_ress                                5361
> > > 8522          0  UNLIMITED
> > > ges_reg_msgs                                   222
> > > 250       2230  UNLIMITED
> > > ges_big_msgs                                    17
> > > 28       2230  UNLIMITED
> > > ges_rsv_msgs                                     0
> > > 0       1000       1000
> > > gcs_resources                                72634           81356
> > > 122432     122432
> > > gcs_shadows                                  26643
> > > 26663      67337      67337
> > > dml_locks                                        0
> > > 36       1024  UNLIMITED
> > > temporary_table_locks                            0               2
> > > UNLIMITED  UNLIMITED
> > > transactions                                    14
> > > 66       1215  UNLIMITED
> > > branches                                         2
> > > 28       1215  UNLIMITED
> > > cmtcallbk                                        4
> > > 29       1215  UNLIMITED
> > > sort_segment_locks                             134             137
> > > UNLIMITED  UNLIMITED
> > > max_rollback_segments                           11
> > > 11        244        244
> > > max_shared_servers                               1
> > > 1         20         20
> > > parallel_max_servers                             4
> > > 121        241        241
>
> > > 22 rows selected.
>
> > > Thanks.
>
> > Hi Shweta,
>
> > I meant on the OS itself, i.e. HP-UX kernel limits.  I have seen
> > exceptions such as the one you posted when processes, open files, etc.
> > were approaching/at their maximum limit as allowed/configured by the
> > system administrator.
>
> > HTH,
>
> > Steve- Hide quoted text -
>
> > - Show quoted text -
>
> Thanks Mark and Steve,
>
> Metalink Document 146859.1 describes the exact problem
>
> and suggested fix is -
>
> "The problem can be avoided by raising the value of UNIX kernel
> parameter:
>
>         maxuprc - max number of processes per user
>
> Refer to the HP Operating system documentation for detailed steps."
>
> I need some clarification on this :
>
> a) Here "max number of processes per user"  : does it referring to
> unix   "oracle" user.
> because each processes are owned /fork by oracle user at operating
> system level?
>
> b) Any issues/side effects if we change the maxuprc.
>
> Regards

As long as the server can handle that many processes, it is just a matter of increasing them. AFAIK, this can be done live, so ask your HP-UX system administrator to bump them up.

Alos, maybe you have idle connections that could be released (a good admin is probably going to ask you that before he/she bumps up the number)? Received on Thu Jan 08 2009 - 14:22:51 CST