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help / color / mirror / Atom feedFrom: Kaixi Luo <[email protected]>
To: Wes Vaske (wvaske) <[email protected]>
To: Merlin Moncure <[email protected]>
Cc: postgres performance list <[email protected]>
Subject: Re: Tuning guidelines for server with 256GB of RAM and SSDs?
Date: Thu, 07 Jul 2016 21:06:53 +0000
Message-ID: <CAHo5iyh2ePUGdtCLEZijW0x_eGNk_toj37n74iGka09SVxY1Qg@mail.gmail.com> (raw)
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> Regarding write back cache:
> Disabling the write back cache won't have a real large impact on the
> endurance of the drive unless it reduces the total number of bytes written
> (which it won't). I've seen drives that perform better with it disabled and
> drives that perform better with it enabled. I would test in your
> environment and make the decision based on performance.
>
>
Thanks. I assume you are referring to the write back cache on the RAID
controller here and not the disk cache itself.
Kaixi
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Subject: Re: Tuning guidelines for server with 256GB of RAM and SSDs?
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