There is no problem dumping large tables using parallel dump. My script had limit on the file size that was causing parallel dump to abort on large tables. Thanks everyone for their valuable suggestion.
Thanks shanker From: Shanker Singh Sent: Monday, February 23, 2015 6:18 PM To: Sterfield Cc: Tom Lane; r...@iol.ie; pgsql-general@postgresql.org; Shanker Singh Subject: RE: [GENERAL] parallel dump fails to dump large tables I tried dumping the largest table that is having problem using –j1 flag in parallel dump. This time I got error on the console “File size limit exceeded” but the system allows Unlimited file size. Also the pg_dump without –j flag goes through fine. Do you guys know what’s going on with parallel dump? The system is 64 bit centos( 2.6.32-504.8.1.el6.x86_64 #1 SMP Wed Jan 28 21:11:36 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux) with ext4 file system. limit cputime unlimited filesize unlimited datasize unlimited stacksize 10240 kbytes coredumpsize 0 kbytes memoryuse unlimited vmemoryuse unlimited descriptors 25000 memorylocked 64 kbytes maxproc 1024 From: Sterfield [mailto:sterfi...@gmail.com] Sent: Sunday, February 22, 2015 8:50 AM To: Shanker Singh Cc: Tom Lane; r...@iol.ie<mailto:r...@iol.ie>; pgsql-general@postgresql.org<mailto:pgsql-general@postgresql.org> Subject: Re: [GENERAL] parallel dump fails to dump large tables 2015-02-20 14:26 GMT-08:00 Shanker Singh <ssi...@iii.com<mailto:ssi...@iii.com>>: I tried turning off ssl renegotiation by setting "ssl_renegotiation_limit = 0" in postgresql.conf but it had no effect. The parallel dump still fails on large tables consistently. Thanks Shanker HI, Maybe you could try to setup an SSH connection between the two servers, with a keepalive option, and left it open for a long time (at least the duration of your backup), just to test if your ssh connection is still being cut after some time. That way, you will be sure if the problem is related to SSH or related to Postgresql. Thanks, Guillaume -----Original Message----- From: Tom Lane [mailto:t...@sss.pgh.pa.us<mailto:t...@sss.pgh.pa.us>] Sent: Saturday, February 14, 2015 9:00 AM To: r...@iol.ie<mailto:r...@iol.ie> Cc: Shanker Singh; pgsql-general@postgresql.org<mailto:pgsql-general@postgresql.org> Subject: Re: [GENERAL] parallel dump fails to dump large tables "Raymond O'Donnell" <r...@iol.ie<mailto:r...@iol.ie>> writes: > On 14/02/2015 15:42, Shanker Singh wrote: >> Hi, >> I am having problem using parallel pg_dump feature in postgres >> release 9.4. The size of the table is large(54GB). The dump fails >> with the >> error: "pg_dump: [parallel archiver] a worker process died >> unexpectedly". After this error the pg_dump aborts. The error log >> file gets the following message: >> >> 2015-02-09 15:22:04 PST [8636]: [2-1] >> user=pdroot,db=iii,appname=pg_dump >> STATEMENT: COPY iiirecord.varfield (id, field_type_tag, marc_tag, >> marc_ind1, marc_ind2, field_content, field_group_id, occ_num, >> record_id) TO stdout; >> 2015-02-09 15:22:04 PST [8636]: [3-1] >> user=pdroot,db=iii,appname=pg_dump >> FATAL: connection to client lost > There's your problem - something went wrong with the network. I'm wondering about SSL renegotiation failures as a possible cause of the disconnect --- that would explain why it only happens on large tables. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org<mailto:pgsql-general@postgresql.org>) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
