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Date:      Wed, 29 May 2013 13:38:47 -0500
From:      Adam Vande More <amvandemore@gmail.com>
To:        Warren Block <wblock@wonkity.com>
Cc:        Polytropon <freebsd@edvax.de>, Erich Dollansky <erichsfreebsdlist@alogt.com>, Michael Sierchio <kudzu@tenebras.com>, "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>, "M. V." <bored_to_death85@yahoo.com>
Subject:   Re: "swap" partition leads to instability?
Message-ID:  <CA%2BtpaK3scem8SQJh3rXocLGxrxZbwSrsYd2QHap-=sjv0VqQ%2Bg@mail.gmail.com>
In-Reply-To: <CA%2BtpaK1etah3hZ-bkF1j6DnVbxrFkGUhcQhny5%2BUhrZ=bbB-eA@mail.gmail.com>
References:  <1369558712.96152.YahooMailNeo@web165006.mail.bf1.yahoo.com> <20130526160906.4e379016@X220.ovitrap.com> <20130526113235.f5dbe768.freebsd@edvax.de> <alpine.BSF.2.00.1305261724050.29348@wonkity.com> <CA%2BtpaK106Fu0dKmR-4_e3ZjnjoMb3ZrjWEscXX99v1qj4BzCJw@mail.gmail.com> <alpine.BSF.2.00.1305261813040.30008@wonkity.com> <CA%2BtpaK3QwWJR5F1=1p=hQHvSDXcV_vXkX5W=pbmoQGVrZu3-dA@mail.gmail.com> <CAHu1Y72PxQ_Jtw_8RFuph1X60exkEwKvh2WkZtL0Xt0AkOFQzw@mail.gmail.com> <alpine.BSF.2.00.1305291201590.56816@wonkity.com> <CA%2BtpaK1etah3hZ-bkF1j6DnVbxrFkGUhcQhny5%2BUhrZ=bbB-eA@mail.gmail.com>

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PS -- Moderating questions@ is just awful.  I'm disappointed.

On Wed, May 29, 2013 at 1:34 PM, Adam Vande More <amvandemore@gmail.com> wrote:
> On Wed, May 29, 2013 at 1:05 PM, Warren Block <wblock@wonkity.com> wrote:
>> And you don't think the presence of TRIM--where the SSD can actually know
>> which blocks are no longer in use--is worthwhile?
>
> As a whole, TRIM is worthwhile.  However when an SSD is
> overprovisioned it provides a lot of benefits.  TRIM-less swap in this
> case doesn't.  The PE rate of the worst MLC SSD's at this point is
> @3000 AFAIK.  Given those figures and average desktop swap rate at my
> estimation, prioritizing write endurance on an SSD is not
> beneficial(especially with a SanForce).  If you are swapping
> continuously something like ZeusRAM may be required.  There are
> probably other solutions available as well as other 3rd party ones.
> If you are swapping a lot, the best case is usually to add RAM.
>
> --
> Adam Vande More



-- 
Adam Vande More



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