Date: Tue, 11 Aug 2015 12:59:38 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Dmitry Morozovsky <marck@rinet.ru> 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: <55C9C78A.2070707@FreeBSD.org> In-Reply-To: <alpine.BSF.2.00.1508111237430.9571@woozle.rinet.ru> References: <201508101034.t7AAYOtk074606@repo.freebsd.org> <alpine.BSF.2.00.1508111237430.9571@woozle.rinet.ru>
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On 11.08.2015 12:38, Dmitry Morozovsky wrote: > 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? Theoretically planned, but no specific terms yet -- too many changes. -- Alexander Motin
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