På tirsdag 10. april 2018 kl. 19:41:59, skrev Craig James <cjames@xxxxxxxxxxxxxx>:
On Tue, Apr 10, 2018 at 12:21 AM, Andreas Joseph Krogh <andreas@xxxxxxxxxx> wrote:På tirsdag 10. april 2018 kl. 04:36:27, skrev Craig James <cjames@xxxxxxxxxxxxxx>: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 memory12-drive 7200 RPM 500GBRAID1 (2 disks, OS and WAL log)RAID10 (8 disks, postgres data dir)2 sparesUbuntu 16.04Postgres 9.6The current system peaks at about 7000 TPS from pgbench.With what arguments (also initialization)?pgbench -i -s 100 -U testpgbench -U test -c ... -t ...-c -t TPS5 20000 520210 10000 791620 5000 792430 3333 727040 2500 502050 2000 6417
FWIW; We're testing this: https://www.supermicro.nl/products/system/1U/1029/SYS-1029U-TN10RT.cfm
with 4 x Micron NVMe 9200 PRO NVMe 3.84TB U.2 in RAID-10:
$ pgbench -s 100 -c 64 -t 10000 pgbench
scale option ignored, using count from pgbench_branches table (100)
starting vacuum...end.
transaction type: <builtin: TPC-B (sort of)>
scaling factor: 100
query mode: simple
number of clients: 64
number of threads: 1
number of transactions per client: 10000
number of transactions actually processed: 640000/640000
latency average = 2.867 ms
tps = 22320.942063 (including connections establishing)
tps = 22326.370955 (excluding connections establishing)
scale option ignored, using count from pgbench_branches table (100)
starting vacuum...end.
transaction type: <builtin: TPC-B (sort of)>
scaling factor: 100
query mode: simple
number of clients: 64
number of threads: 1
number of transactions per client: 10000
number of transactions actually processed: 640000/640000
latency average = 2.867 ms
tps = 22320.942063 (including connections establishing)
tps = 22326.370955 (excluding connections establishing)
--
Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47 909 56 963
