Date: Sun, 24 Jun 2018 07:18:14 -0500 From: Bob Willcox <bob@immure.com> To: james <james@mansionfamily.plus.com> Cc: questions list <freebsd-questions@freebsd.org> Subject: Re: Limiting ZFS ARC Size? Message-ID: <20180624121814.GS8115@rancor.immure.com> In-Reply-To: <2f30e611-acaa-b4c4-cb2e-1c9a220a1af0@mansionfamily.plus.com> References: <20180618162419.GA41031@rancor.immure.com> <2f30e611-acaa-b4c4-cb2e-1c9a220a1af0@mansionfamily.plus.com>
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On Sun, Jun 24, 2018 at 09:32:41AM +0100, james wrote: > On 18/06/2018 17:24, Bob Willcox wrote: > > to the point where my running processes (such as firefox) start page > > thrashing. > > I thought ARC was supposed to give up memory if there is memory pressure > that causes applications to page? That was what I was expecting as well. However ARC had consumed most of the memory (about 25G, 30G was wired) and firefox was paging like crazy. I did discover what program was causing ARC to grow seeming unbounded, it was vlc. I have something over 64k audio tracks that I had pointed vlc to with shuffle set. It must be recursively reading all of the files in the heirarchy and zfs is cacheing a bunch of data as it goes. Bob -- Bob Willcox | Isn't air travel wonderful? bob@immure.com | Breakfast in London, dinner in New York, Austin, TX | luggage in Brazil.
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