[postgis-users] Postgis and Ramdisk

[Andreas Neumann]

answering my own email with a new question on the same topic:

Increasing the shared_buffer value, does this have the same effect as 
storing all data in a ramdisk?

Here is a little discussion on the topic:
http://magazine.redhat.com/2007/12/12/tip-from-an-rhce-memory-storage-on-postgresql/

Here is one quote from the discussion:

"Increasing shared buffers can effectively keep a db in memory. The 
default configuration has traditionally been way too conservative - am 
sure someone will eventually get round to writing a script to tune 
configuration based on a user response to questions and hardware probing.

Course if the data is not critical and you just need something 
lightweight there are application specific options…"

Any other online-resources on the topic?

Thanks,
Andreas


Andreas Neumann wrote:
> Hi,
>
> I wonder if people have experiences with running Postgis with 
> tablespaces on a ramdisk?
>
> How are the performance gains - is it worth a try?
>
> My DB is several hundred mb (300-400 - may grow), the physical RAM is 
> 8GB. Most of the DB is read-only. I would perhaps only store the 
> read-only part in the RAM-disk and the read-write part on harddisk.
>
> Thanks for any hints, resources or experiences regarding Postgis and 
> RAM-Disk.
>
> Andreas
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