Date: Tue, 11 Aug 2015 12:38:39 +0300 (MSK) From: Dmitry Morozovsky <marck@rinet.ru> To: Alexander Motin <mav@freebsd.org> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r286570 - in head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs: . sys Message-ID: <alpine.BSF.2.00.1508111237430.9571@woozle.rinet.ru> In-Reply-To: <201508101034.t7AAYOtk074606@repo.freebsd.org> References: <201508101034.t7AAYOtk074606@repo.freebsd.org>
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Alexander, On Mon, 10 Aug 2015, Alexander Motin wrote: > Author: mav > Date: Mon Aug 10 10:34:23 2015 > New Revision: 286570 > URL: https://svnweb.freebsd.org/changeset/base/286570 > > Log: > MFV r277426: 5408 managing ZFS cache devices requires lots of RAM > > illumos/illumos-gate@89c86e32293a30cdd7af530c38b2073fee01411c [snip] > For an average blocksize of 8KB, this means that for the L2ARC, the ratio > of metadata to data has gone down from about 2.92% to 1.56%. For a > 'storage optimized' EC2 instance with 1600GB of SSD and 60GB of RAM, this > means that we expect a completely full L2ARC to use (1600 GB * 0.0156) / > 60GB = 41% of the available memory, down from 78%. Thanks! Any MFC planned please? -- Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] [ FreeBSD committer: marck@FreeBSD.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** ------------------------------------------------------------------------
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