| From: | Hannu Krosing <hannu(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Greg Smith <greg(at)2ndQuadrant(dot)com> |
| Cc: | didier <did447(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Design proposal: fsync absorb linear slider |
| Date: | 2013-07-26 10:02:20 |
| Message-ID: | 51F2492C.9090706@2ndQuadrant.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On 07/26/2013 11:42 AM, Greg Smith wrote:
> On 7/25/13 6:02 PM, didier wrote:
>> It was surely already discussed but why isn't postresql writing
>> sequentially its cache in a temporary file?
>
> If you do that, reads of the data will have to traverse that temporary
> file to assemble their data.
In case of crash recovery, a sequential reading of this file could be
performed as first step.
this should work fairly well in most cases, at least when the recovery
shared_buffers is not smaller
than the latest run of checkpoint-written dirty buffers.
--
Hannu Krosing
PostgreSQL Consultant
Performance, Scalability and High Availability
2ndQuadrant Nordic OÜ
| From | Date | Subject | |
|---|---|---|---|
| Next Message | marco atzeri | 2013-07-26 10:15:30 | Re: install libpq.dll in bin directory on Windows / Cygwin |
| Previous Message | Hannu Krosing | 2013-07-26 09:59:53 | Re: Design proposal: fsync absorb linear slider |