Re: SSD Drives - Mailing list pgsql-general

From Vick Khera
Subject Re: SSD Drives
Date
Msg-id CALd+dccYb4ZQRsTrV+5LLM=-s9LJQQtDDM+BG6vd0szfeRyMDg@mail.gmail.com
Whole thread Raw
In response to Re: SSD Drives  (John R Pierce <pierce@hogranch.com>)
List pgsql-general
On Thu, Apr 3, 2014 at 4:00 PM, John R Pierce <pierce@hogranch.com> wrote:
> an important thing in getting decent wear leveling life with SSDs is to keep
> them under about 70% full.

You have to do that at provisioning time in the drive. Ie, once you
layer a file system on it, the drive doesn't know what's "empty" and
what's not; you have to tell it before hand that only show X% to the
system, and keep the rest for wear leveling. I don't know the tools
for doing it, as my vendor takes care of that for me.


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