| From: | Mark Kirkwood <mark(dot)kirkwood(at)catalyst(dot)net(dot)nz> |
|---|---|
| To: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Very poor read performance, query independent |
| Date: | 2017-07-14 23:57:11 |
| Message-ID: | dadb1945-062f-c565-26ee-d334898d7cf5@catalyst.net.nz |
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| Lists: | pgsql-performance |
Thinking about this a bit more - if somewhat more blazing performance is
needed, then this could be achieved via losing the RAID card and
spinning disks altogether and buying 1 of the NVME or SATA solid state
products: e.g
- Samsung 960 Pro or Evo 2 TB (approx 1 or 2 GB/s seq scan speeds and
200K IOPS)
- Intel S3610 or similar 1.2 TB (500 MB/s seq scan and 30K IOPS)
The Samsung needs an M.2 port on the mobo (but most should have 'em -
and if not PCIe X4 adapter cards are quite cheap). The Intel is a bit
more expensive compared to the Samsung, and is slower but has a longer
lifetime. However for your workload the Sammy is probably fine.
regards
Mark
On 15/07/17 11:09, Mark Kirkwood wrote:
> Ah yes - that seems more sensible (but still slower than I would
> expect for 5 disks RAID 0).
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