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Re: Benchmarking: How to identify bottleneck (limiting factor) andachieve "linear scalability"? - Mailing list pgsql-performance
From
Saurabh Nanda
Subject
Re: Benchmarking: How to identify bottleneck (limiting factor) andachieve "linear scalability"?
Date
January 28, 2019
17:03:31
Msg-id
CAPz=2oFaS-xeVdYuidrXV9zvp-+d+x713K52rdgfp09HaP+Q4A@mail.gmail.com
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Re: Benchmarking: How to identify bottleneck (limiting factor) andachieve "linear scalability"?
(Saurabh Nanda <saurabhnanda@gmail.com>)
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Re: Benchmarking: How to identify bottleneck (limiting factor) andachieve "linear scalability"?
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An update. It seems (to my untrained eye) that something is wrong with the second SSD in the RAID configuration. Here's my question on serverfault related to what I saw with iostat -
https://serverfault.com/questions/951096/difference-in-utilisation-reported-by-iostat-for-two-identical-disks-in-raid1
I've disabled RAID and rebooted the server to run the benchmarks with client=1,4,8,12 with shared_buffers=8MB (default) vs shared_buffers=2GB (optimised?) and will report back.
-- Saurabh.
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