Date: Tue, 10 Apr 2007 02:35:57 +0000 (UTC) From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/compat/opensolaris/kern opensolaris_kmem.c src/sys/compat/opensolaris/sys kmem.h src/sys/contrib/opensolaris/uts/common/fs/zfs arc.c src/sys/contrib/opensolaris/uts/common/fs/zfs/sys zfs_context.h Message-ID: <200704100235.l3A2ZvdG041035@repoman.freebsd.org>
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pjd 2007-04-10 02:35:57 UTC
FreeBSD src repository
Modified files:
sys/compat/opensolaris/kern opensolaris_kmem.c
sys/compat/opensolaris/sys kmem.h
sys/contrib/opensolaris/uts/common/fs/zfs arc.c
sys/contrib/opensolaris/uts/common/fs/zfs/sys zfs_context.h
Log:
Try to stabilize ZFS with regard to memory consumption:
- Allow to shrink ARC down to 16MB (instead of 64MB).
- Set arc_max to 1/2 of kmem_map by default.
- Start freeing things earlier when low memory situation is detected.
- Serialize execution of arc_lowmem().
I decided to setup minimum ZFS memory requirements to 512MB of RAM and 256MB of
kmem_map size. If there is less RAM or kmem_map, a warning will be printed.
World is cruel, be no better. In other words: modern file system requires
modern hardware:)
From ZFS administration guide:
"Currently the minimum amount of memory recommended to install a Solaris
system is 512 Mbytes. However, for good ZFS performance, at least one
Gbyte or more of memory is recommended."
Revision Changes Path
1.2 +23 -8 src/sys/compat/opensolaris/kern/opensolaris_kmem.c
1.2 +5 -2 src/sys/compat/opensolaris/sys/kmem.h
1.6 +35 -14 src/sys/contrib/opensolaris/uts/common/fs/zfs/arc.c
1.3 +0 -2 src/sys/contrib/opensolaris/uts/common/fs/zfs/sys/zfs_context.h
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