Re: increasing the default WAL segment size

On Thu, Jul 6, 2017 at 3:21 PM, tushar <tushar(dot)ahuja(at)enterprisedb(dot)com> wrote:
> On 07/06/2017 12:04 PM, Beena Emerson wrote:
>>
>> The 04-initdb-walsegsize_v2.patch has the following improvements:
>> - Rebased over new 03 patch
>> - Pass the wal-segsize intidb option as command-line option rathern
>> than in an environment variable.
>> - Since new function check_wal_size had only had two checks and was
>> sed once, moved the code to ReadControlFile where it is used and
>> removed this function.
>> - improve comments and add validations where required.
>> - Use DEFAULT_XLOG_SEG_SIZE to set the min_wal_size and
>> max_wal_size,instead of the value 16.
>> - Use XLogSegMaxSize and XLogSegMinSize to calculate the range of guc
>> wal_segment_size instead 16 - INT_MAX.
>
> Thanks Beena. I tested with below following scenarios and all are working
> as expected
> .)Different WAL segment size i.e 1,2,8,16,32,64,512,1024 at the time of
> initdb
> .)SR setup in place.
> .)Combinations of max/min_wal_size in postgresql.conf with different
> wal_segment_size.
> .)shutdown the server forcefully (kill -9) / promote slave / to make sure
> -recovery happened successfully.
> .)with different utilities like pg_resetwal/pg_upgrade/pg_waldump
> .)running pg_bench for substantial workloads (~ 1 hour)
> .)WAL segment size is not default (changed at the time of ./configure) +
> different wal_segment_size (at the time of initdb) .
>
> Things looks fine.
>

Thank you Tushar.

--

Beena Emerson

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