Re: How clear the cache on postgresql?

From: John R Pierce <pierce(at)hogranch(dot)com>
To: pgsql-general(at)lists(dot)postgresql(dot)org
Subject: Re: How clear the cache on postgresql?
Date: 2017-11-24 19:58:28
Message-ID: 7fbbcc3d-695b-c864-314e-ca95e631b888@hogranch.com
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On 11/24/2017 11:43 AM, Michael Nolan wrote:
> There are so many different levels of caching going on--within
> Postgresql, within the OS, within a disk array or SAN, and at the
> individual drive--that there may no longer be a meaningful way to
> perform this measurement.

generally, power cycling the server will flush all the hardware caches
AND the OS cache.

--
john r pierce, recycling bits in santa cruz

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