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Allow to tune maximum and minimum memory used by ARC.

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This commit is contained in:
Pawel Jakub Dawidek 2007-04-07 19:10:50 +00:00
parent 07607ad707
commit 639fdcd852
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=168473
2 changed files with 26 additions and 10 deletions
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18
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
View File

@ -152,8 +152,15 @@ static int arc_dead;
/*
* These tunables are for performance analysis.
*/
uint64_t zfs_arc_max;
uint64_t zfs_arc_min;
u_long zfs_arc_max;
u_long zfs_arc_min;
TUNABLE_ULONG("vfs.zfs.arc_max", &zfs_arc_max);
TUNABLE_ULONG("vfs.zfs.arc_min", &zfs_arc_min);
SYSCTL_DECL(_vfs_zfs);
SYSCTL_ULONG(_vfs_zfs, OID_AUTO, arc_max, CTLFLAG_RD, &zfs_arc_max, 0,
"Maximum ARC size");
SYSCTL_ULONG(_vfs_zfs, OID_AUTO, arc_min, CTLFLAG_RD, &zfs_arc_min, 0,
"Minimum ARC size");
/*
* Note that buffers can be on one of 5 states:
@ -2720,16 +2727,14 @@ arc_init(void)
else
arc_c_max = arc_c_min;
arc_c_max = MAX(arc_c * 6, arc_c_max);
#ifdef notyet
/*
* Allow the tunables to override our calculations if they are
* reasonable (ie. over 64MB)
*/
if (zfs_arc_max > 64<<20 && zfs_arc_max < physmem * PAGESIZE)
if (zfs_arc_max > 64<<20 && zfs_arc_max < vm_kmem_size)
arc_c_max = zfs_arc_max;
if (zfs_arc_min > 64<<20 && zfs_arc_min <= arc_c_max)
arc_c_min = zfs_arc_min;
#endif
arc_c = arc_c_max;
arc_p = (arc_c >> 1);
@ -2739,6 +2744,9 @@ arc_init(void)
if (arc_c < arc_c_min)
arc_c = arc_c_min;
zfs_arc_min = arc_c_min;
zfs_arc_max = arc_c_max;
arc_anon = &ARC_anon;
arc_mru = &ARC_mru;
arc_mru_ghost = &ARC_mru_ghost;

18
sys/contrib/opensolaris/uts/common/fs/zfs/arc.c
View File

@ -152,8 +152,15 @@ static int arc_dead;
/*
* These tunables are for performance analysis.
*/
uint64_t zfs_arc_max;
uint64_t zfs_arc_min;
u_long zfs_arc_max;
u_long zfs_arc_min;
TUNABLE_ULONG("vfs.zfs.arc_max", &zfs_arc_max);
TUNABLE_ULONG("vfs.zfs.arc_min", &zfs_arc_min);
SYSCTL_DECL(_vfs_zfs);
SYSCTL_ULONG(_vfs_zfs, OID_AUTO, arc_max, CTLFLAG_RD, &zfs_arc_max, 0,
"Maximum ARC size");
SYSCTL_ULONG(_vfs_zfs, OID_AUTO, arc_min, CTLFLAG_RD, &zfs_arc_min, 0,
"Minimum ARC size");
/*
* Note that buffers can be on one of 5 states:
@ -2720,16 +2727,14 @@ arc_init(void)
else
arc_c_max = arc_c_min;
arc_c_max = MAX(arc_c * 6, arc_c_max);
#ifdef notyet
/*
* Allow the tunables to override our calculations if they are
* reasonable (ie. over 64MB)
*/
if (zfs_arc_max > 64<<20 && zfs_arc_max < physmem * PAGESIZE)
if (zfs_arc_max > 64<<20 && zfs_arc_max < vm_kmem_size)
arc_c_max = zfs_arc_max;
if (zfs_arc_min > 64<<20 && zfs_arc_min <= arc_c_max)
arc_c_min = zfs_arc_min;
#endif
arc_c = arc_c_max;
arc_p = (arc_c >> 1);
@ -2739,6 +2744,9 @@ arc_init(void)
if (arc_c < arc_c_min)
arc_c = arc_c_min;
zfs_arc_min = arc_c_min;
zfs_arc_max = arc_c_max;
arc_anon = &ARC_anon;
arc_mru = &ARC_mru;
arc_mru_ghost = &ARC_mru_ghost;