Date: Wed, 23 Jul 2014 18:24:37 +0800 From: Erich Dollansky <erichsfreebsdlist@alogt.com> To: Arthur Chance <freebsd@qeng-ho.org> Cc: RW <rwmaillists@googlemail.com>, freebsd-questions@freebsd.org Subject: Re: How much swap space for a 32 GB RAM system? Message-ID: <20140723182437.76a21d55@X220.alogt.com> In-Reply-To: <53CF6820.7080103@qeng-ho.org> References: <53CE8BB8.7030303@qeng-ho.org> <alpine.BSF.2.11.1407221018190.80885@wonkity.com> <20140722203928.6993a78d@gumby.homeunix.com> <alpine.BSF.2.11.1407222030230.28002@wonkity.com> <53CF6820.7080103@qeng-ho.org>
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Hi, On Wed, 23 Jul 2014 08:45:36 +0100 Arthur Chance <freebsd@qeng-ho.org> wrote: > On 23/07/2014 03:32, Warren Block wrote: > > On Tue, 22 Jul 2014, RW wrote: > > > >> On Tue, 22 Jul 2014 10:24:13 -0600 (MDT) > >> Warren Block wrote: > >> > >>> On Tue, 22 Jul 2014, Arthur Chance wrote: > >>> > >>>> I'm getting a new machine with 32 GB of memory. The old "twice > >>>> physical memory" sizing seems ridiculous, so how big should I > >>>> make swap? Do I even need swap with this much memory? > >>> as you have heard a lot of opinions and also found tuning, allow me to share my experience. I am still use swap to be size double of the RAM. The reason is simple. Disk space is cheap. You do not need a fast device for swap if you have a lot of memory but swap makes FreeBSD survive if memory becomes a problem. It also helps you giving you time to fix things manually while the machine is running. On the other side, I have had a single occasion within the last some 5 years in which a big swap helped me. So, it is really rare that you will need a large swap partition. Erich
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