From: | "Luke Lonergan" <llonergan(at)greenplum(dot)com> |
---|---|
To: | "Krishna Kumar" <kumar(dot)ramanathan(at)gmail(dot)com>, pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Benchmarking PGSQL? |
Date: | 2007-02-14 15:35:43 |
Message-ID: | C1F86C4F.27217%llonergan@greenplum.com |
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Lists: | pgsql-performance |
Here¹s one:
Insert performance is limited to about 10-12 MB/s no matter how fast the
underlying I/O hardware. Bypassing the WAL (write ahead log) only boosts
this to perhaps 20 MB/s. We¹ve found that the biggest time consumer in the
profile is the collection of routines that ³convert to datum².
You can perform the test using any dataset, you might consider using the
TPC-H benchmark kit with a data generator available at www.tpc.org. Just
generate some data, load the schema, then perform some COPY statements,
INSERT INTO SELECT FROM and CREATE TABLE AS SELECT.
- Luke
On 2/14/07 2:00 AM, "Krishna Kumar" <kumar(dot)ramanathan(at)gmail(dot)com> wrote:
> Hello All,
> I'm a performance engineer, quite interested in getting deep into the PGSQL
> performance enhancement effort. In that regard, I have the following questions
> :
> 1. Is there a benchmarking setup, that I can access online?
> 2. What benchmarks are we running , for performance numbers?
> 3. What are the current issues, related to performance?
> 4. Where can I start, with the PGSQL performance effort?
>
> Thanks a lot,
> Krishna
>
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