| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | Luke Lonergan <llonergan(at)greenplum(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Subject: | Re: Synchronized Scan benchmark results |
| Date: | 2007-04-03 16:32:57 |
| Message-ID: | 1175617977.4152.9.camel@dogma.v10.wvs |
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| Thread: | |
| Lists: | pgsql-hackers |
On Mon, 2007-04-02 at 21:38 -0700, Luke Lonergan wrote:
> Jeff,
>
> Your conclusions sound great - can you perhaps put the timings in a column
> in your table so we can confirm them?
>
I just threw the logs up, which contain the timings involved. I will try
to make graphs out of them, but the data is there.
The logs contain:
* The time a given backend fetches a page, if that page is an even
multiple of 5k
* The duration of a scan
* The time the scan started
* The cache hit ratio as reported by log_executor_stats
Your right, I do need to summarize it and make it more visually
accessible.
Regards,
Jeff Davis
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