| From: | Vick Khera <vivek(at)khera(dot)org> |
|---|---|
| To: | pgsql-general <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: SSD Drives |
| Date: | 2014-04-08 13:53:06 |
| Message-ID: | CALd+dccYb4ZQRsTrV+5LLM=-s9LJQQtDDM+BG6vd0szfeRyMDg@mail.gmail.com |
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| Lists: | pgsql-general |
On Thu, Apr 3, 2014 at 4:00 PM, John R Pierce <pierce(at)hogranch(dot)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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