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Operating Systems Solaris ZFS : Can arc size value exceed Physical RAM ? Post 302713553 by jlliagre on Thursday 11th of October 2012 01:48:41 AM
Old 10-11-2012
Quote:
Originally Posted by sapre_amit
kstat -p -m zfs -n arcstats -s size returns
zfs:0:arcstats:size 8177310584
this values is approx (7.61 GB) but my Physical Memory size is only 6144 Megabytes.

Can this happen ?
If your NGZ physical memory is capped, this can indeed happen. kernel memory is shared by all zones so is not restricted by capping.
What says, from the global zone:
Code:
echo ::memstat | mdb -k

?
 

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zstreamdump(8)						  System Administration Commands					    zstreamdump(8)

NAME
zstreamdump - filter data in zfs send stream SYNOPSIS
zstreamdump [-C] [-v] DESCRIPTION
The zstreamdump utility reads from the output of the zfs send command, then displays headers and some statistics from that output. See zfs(1M). OPTIONS
The following options are supported: -C Suppress the validation of checksums. -v Verbose. Dump all headers, not only begin and end headers. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWzfsu | +-----------------------------+-----------------------------+ |Interface Stability |Uncommitted | +-----------------------------+-----------------------------+ SEE ALSO
zfs(1M), attributes(5) SunOS 5.11 21 Sep 2009 zstreamdump(8)
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