Re: parallel dump fails to dump large tables

2015-02-20 14:26 GMT-08:00 Shanker Singh <ssingh@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

-----Original Message-----
From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
Sent: Saturday, February 14, 2015 9:00 AM
To: rod@iol.ie
Cc: Shanker Singh; pgsql-general@postgresql.org
Subject: Re: [GENERAL] parallel dump fails to dump large tables

"Raymond O'Donnell" <rod@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


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