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Change the default 'zfs_dedup_prefetch' value to '0'

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This gives a huge performance improvement in operations with deduped
datasets especially when the bottleneck is the amount of ram
available for zfs.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2639
This commit is contained in:
Alexey Smirnoff
2014-08-30 09:13:26 +07:00
committed by Brian Behlendorf
parent 287be44f53
commit 0dfc732416
2 changed files with 2 additions and 2 deletions
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module/zfs/ddt.c
+1 -1
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@@ -43,7 +43,7 @@ static kmem_cache_t *ddt_entry_cache;
/*
* Enable/disable prefetching of dedup-ed blocks which are going to be freed.
*/
int zfs_dedup_prefetch = 1;
int zfs_dedup_prefetch = 0;
static const ddt_ops_t *ddt_ops[DDT_TYPES] = {
&ddt_zap_ops,