Re: [WIP] Performance Improvement by reducing WAL for Update Operation

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От Amit Kapila
Тема Re: [WIP] Performance Improvement by reducing WAL for Update Operation
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Msg-id 003a01cd8012$caf3bbb0$60db3310$@kapila@huawei.com
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Ответ на Re: [WIP] Performance Improvement by reducing WAL for Update Operation  (Amit kapila <amit.kapila@huawei.com>)
Ответы Re: [WIP] Performance Improvement by reducing WAL for Update Operation
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From: Jesper Krogh [mailto:jesper@krogh.cc]
Sent: Wednesday, August 22, 2012 1:13 AM
On 21/08/12 16:57, Amit kapila wrote:

>>Test results:

>>1. The pgbench test run for 10min.
>> 2. The test reult is for modified pgbench (such that total row size is 1800 and updated columns are of length 300) tpc-b testcase.
>>     The result and modified pgbench code is attached with mail.

>> 3. The performance improvement shown in the m/c I have tested is quite good (more than 100% for sync commit = off).


> I cannot comment on completeness or correctness of the code, but I do think a relevant test would be
> to turn synchronous_commit on as default.


> Even though you aim at an improved performance, it would be nice to see the reduction in WAL-size
>as an effect of this patch.

Yes, I shall take care of doing both the above tests and send the report.

 

With Regards,

Amit Kapila.

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