| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com> |
| Cc: | Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru>, 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 11:37:05 |
| Message-ID: | 20170221113705.ud2wgee36yclewoc@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
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.
- Andres
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