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From: Fujii Masao <[email protected]>
To: Alvaro Herrera <[email protected]>
Cc: [email protected]
Cc: pgsql-docs <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: max_worker_processes on the standby
Date: Thu, 1 Oct 2015 19:46:04 +0900
Message-ID: <CAHGQGwHRXGqSYoUf+aTf0icMq8Or6oBcEN+Y=2cZ4wLW_5acHw@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <ca44c6c7f9314868bdc521aea4f77cbf@MP-MSGSS-MBX004.msg.nttdata.co.jp>
	<CAHGQGwHereDzzzmfxEBYcVQu3oZv6vZcgu1TPeERWbDc+gQ06g@mail.gmail.com>
	<[email protected]>
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On Thu, Oct 1, 2015 at 7:48 AM, Alvaro Herrera <[email protected]> wrote:
> [email protected] wrote:
>
>> The below error messages were shown in standby server log:
>>
>> FATAL:  could not access status of transaction 9009
>> DETAIL:  Could not read from file "pg_commit_ts/0000" at offset 90112: Success.
>> CONTEXT:  xlog redo Transaction/COMMIT: 2015-09-30 15:52:41.924141+09
>> LOG:  startup process (PID 23199) exited with exit code 1
>> LOG:  terminating any other active server processes
>>
>> Before this FATAL, there were some INFO but annoying messages:
>>
>> LOG:  file "pg_commit_ts/0000" doesn't exist, reading as zeroes
>
> Here's a patch.

I've not read the patch yet, but the patched server with track_commit_timestamp
enabled caused the following PANIC error when I ran pgbench.

PANIC:  could not access status of transaction 2457
DETAIL:  Could not read from file "pg_commit_ts/0000" at offset 24576: Success.
STATEMENT:  END;

The procedure to reproduce the PANIC error is,

1. Enable track_commit_timestamp
2. Start up the server
3. Run pgbench -i -s10
4. Run pgbench -j 4 -c 4 -T 30

Regards,

-- 
Fujii Masao


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