| From: | Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com> |
|---|---|
| To: | Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Robert Haas <robertmhaas(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Bernd Helmle <mailings(at)oopsware(dot)de>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Should we cacheline align PGXACT? |
| Date: | 2017-02-21 13:03:03 |
| Message-ID: | CAE9k0Pn5bAxZQiUxcNZxABGx5SjRtidnmTAekgapBrLoG1xjhw@mail.gmail.com |
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On Tue, Feb 21, 2017 at 5:52 PM, Alexander Korotkov
<a(dot)korotkov(at)postgrespro(dot)ru> wrote:
> On Tue, Feb 21, 2017 at 2:37 PM, Andres Freund <andres(at)anarazel(dot)de> wrote:
>>
>> On 2017-02-21 16:57:36 +0530, Ashutosh Sharma wrote:
>> > Yes, there is still some regression however it has come down by a
>> > small margin. I am not doing initdb for each run instead I am doing,
>> > dropdb-->createdb-->pgbench -i. Is dropping old database and creating
>> > a new one for every run not okay, Do I have to do initdb every time.
>> > Okay, I can change the order of reading and let you know the results.
>>
>> That does make a difference. Primarily because WAL writes in a new
>> cluster are a more expensive than in an old one, because of segment
>> recycling.
>
>
> +1
okay, understood. Will take care of it when I start with next round of
testing. Thanks.
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