Re: Latest advice on SSD?

On Tue, Apr 10, 2018 at 12:21 AM, Andreas Joseph Krogh <andreas(at)visena(dot)com>
wrote:

> På tirsdag 10. april 2018 kl. 04:36:27, skrev Craig James <
> cjames(at)emolecules(dot)com>:
>
> One of our four "big iron" (spinning disks) servers went belly up today.
> (Thanks, Postgres and pgbackrest! Easy recovery.) We're planning to move to
> a cloud service at the end of the year, so bad timing on this. We didn't
> want to buy any more hardware, but now it looks like we have to.
>
> I followed the discussions about SSD drives when they were first becoming
> mainstream; at that time, the Intel devices were king. Can anyone recommend
> what's a good SSD configuration these days? I don't think we want to buy a
> new server with spinning disks.
>
> We're replacing:
> 8 core (Intel)
> 48GB memory
> 12-drive 7200 RPM 500GB
> RAID1 (2 disks, OS and WAL log)
> RAID10 (8 disks, postgres data dir)
> 2 spares
> Ubuntu 16.04
> Postgres 9.6
>
> The current system peaks at about 7000 TPS from pgbench.
>
>
> With what arguments (also initialization)?
>

pgbench -i -s 100 -U test
pgbench -U test -c ... -t ...

-c -t TPS
5 20000 5202
10 10000 7916
20 5000 7924
30 3333 7270
40 2500 5020
50 2000 6417

>
> --
> Andreas Joseph Krogh
>
>

--
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Craig A. James
Chief Technology Officer
eMolecules, Inc.
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