Fw: Spin lock error - Mailing list pgsql-general
From | Differentiated Software Solutions Pvt. Ltd. |
---|---|
Subject | Fw: Spin lock error |
Date | |
Msg-id | 001601bf46bb$2387e340$8ab6c5cb@nagma Whole thread Raw |
Responses |
Re: Fw: Spin lock error
(The Hermit Hacker <scrappy@hub.org>)
Re: [GENERAL] Fw: Spin lock error (Lincoln Spiteri <lincoln.spiteri@st.com>) |
List | pgsql-general |
Hi, Thanks for responding. This is a copy of my message which has all details which I could think of to start with. I would be glad to receive any suggesstions. Bye, Murali -----Original Message----- From: Differentiated Software Solutions Pvt. Ltd. <diffs@vsnl.com> To: pgsql-general@postgresql.org <pgsql-general@postgresql.org>; vadim@krs.ru <vadim@krs.ru>; pgsql-interfaces@postgresql.org <pgsql-interfaces@postgresql.org> Cc: Kimi <kimi@intercept.co.in> Date: 11 December 1999 12:33 Subject: Spin lock error >Hi, > >We are getting spinlock errors under the following conditions > >Background : >We have developed a high performance application using postgres database a >3rd party application server). >This application should be scalanble to server 50 requests a second. >Application is written in perl 5.005 using DBI-1.12, DBD-Pg 0.92 and Redhat >linux 6.0 >A request consists of one singleton select on a table of 200,000 rows on >it's primary key, a heavy duty cursor which is a 4 table join but which >returns 100 rows from tables containing maximum of 250 rows, a light sql >opening a cursor on a table containing 500 rows, 2 inserts into tables which >don't have primary key. > >We are connecting to the database with autoconnect off. > >Problem description : >On a light load there are no problems. As we have increased the load on the >application, the requests get piled up. We keep monitoring the requests >getting piled up using ps ax | grep post. >Somewhere when the requests crosses 20(ps returns more than 20 rows).... >suddenly postmaster comes down !! In the server log the following message is >written out. >FATAL: s_lock(4000b011) at spin.c:125, stuck spinlock. Aborting. > >FATAL: s_lock(4000b011) at spin.c:125, stuck spinlock. Aborting. > >FATAL: s_lock(4000b011) at spin.c:125, stuck spinlock. Aborting. > >FATAL: s_lock(4000b011) at spin.c:125, stuck spinlock. Aborting. > >FATAL: s_lock(40179f44) at bufmgr.c:490, stuck spinlock. Aborting. >After this postmaster shutdown. > >One observation If we try to recreate this in another linux machine... >multiple postmasters run in the linux machine when the number of requests >become more. >I'm also attaching a file containing 'ps' at the instance postmaster >crashed. > >Can anybody please help > >Thanks and regards, > >Murali > >Differentiated Software Solutions Pvt. Ltd., >176, Gr. Floor, 6th Main >2nd Block RT Nagar >Bangalore - 560 032 >India >Ph: 91 80 3431470 >
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