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Re: write scalability

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com>
Cc: Greg Smith <greg(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: write scalability
Date: 2011-07-26 16:24:51
Message-ID: CA+TgmoYiPqrBQrJ3PBytJrN=d6RQR+KFxB33=Sct9nqDmC6rRg@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On Tue, Jul 26, 2011 at 11:40 AM, Pavan Deolasee
<pavan(dot)deolasee(at)gmail(dot)com> wrote:
> On Tue, Jul 26, 2011 at 9:07 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> On Mon, Jul 25, 2011 at 10:14 PM, Greg Smith <greg(at)2ndquadrant(dot)com> wrote:
>>> On 07/25/2011 04:07 PM, Robert Haas wrote:
>>>>
>>>> I did 5-minute pgbench runs with unlogged tables and with permanent
>>>> tables, restarting the database server and reinitializing the tables
>>>> between each run.
>>>
>>> Database scale?  One or multiple pgbench worker threads?  A reminder on the
>>> amount of RAM in the server would be helpful for interpreting the results
>>> too.
>>
>> Ah, sorry.  scale = 100, so small.  pgbench invocation is:
>>
>
> It might be worthwhile to test only with the accounts and history
> table and also increasing the number of statements in a transaction.
> Otherwise the tiny tables can quickly become a bottleneck.

What kind of bottleneck?

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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