Displaying 11 results from an estimated 11 matches for "mru_ghost".
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mfu_ghost
2008 Aug 20
9
ARCSTAT Kstat Definitions
Would someone "in the know" be willing to write up (preferably blog) definitive definitions/explanations of all the arcstats provided via kstat? I''m struggling with proper interpretation of certain values, namely "p", "memory_throttle_count", and the mru/mfu+ghost hit vs demand/prefetch hit counters. I think I''ve got it figured out, but
2006 Nov 09
16
Some performance questions with ZFS/NFS/DNLC at snv_48
Hello.
We''re currently using a Sun Blade1000 (2x750MHz, 1G ram, 2x160MB/s mpt
scsi buses, skge GigE network) as a NFS backend with ZFS for
distribution of free software like Debian (cdimage.debian.org,
ftp.se.debian.org) and have run into some performance issues.
We are running SX snv_48 and have run with a raidz2 with 7x300G for a
while now, just added another 7x300G raidz2 today but
2010 Mar 21
1
arc_summary.pl results
...ts Only]
Data Demand Efficiency: 99%
Data Prefetch Efficiency: 40%
CACHE HITS BY CACHE LIST:
Anon: 2% 1198857 [ New Customer, First Cache Hit ]
Most Recently Used: 2% 1435141 (mru) [ Return Customer ]
Most Frequently Used: 95% 57293484 (mfu) [ Frequent Customer ]
Most Recently Used Ghost: 0% 201 (mru_ghost) [ Return Customer Evicted, Now
Back ]
Most Frequently Used Ghost: 0% 1679 (mfu_ghost) [ Frequent Customer Evicted,
Now Back ]
CACHE HITS BY DATA TYPE:
Demand Data: 91% 54885238
Prefetch Data: 0% 15730
Demand Metadata: 6% 3820665
Prefetch Metadata: 2% 1207729
CACHE MISSES BY DATA TYPE:
Demand Data:...
2010 Apr 30
0
ARC Summary
...Hits Only]
Data Demand Efficiency: 98%
Data Prefetch Efficiency: 23%
CACHE HITS BY CACHE LIST:
Anon: 24% 1342485 [ New Customer, First Cache Hit ]
Most Recently Used: 7% 396106 (mru) [ Return Customer ]
Most Frequently Used: 68% 3826139 (mfu) [ Frequent Customer ]
Most Recently Used Ghost: 0% 16 (mru_ghost) [ Return Customer Evicted, Now
Back ]
Most Frequently Used Ghost: 0% 24 (mfu_ghost) [ Frequent Customer Evicted,
Now Back ]
CACHE HITS BY DATA TYPE:
Demand Data: 50% 2833150
Prefetch Data: 0% 6806
Demand Metadata: 24% 1383720
Prefetch Metadata: 24% 1341094
CACHE MISSES BY DATA TYPE:
Demand Data: 4...
2010 Apr 05
0
Why does ARC grow above hard limit?
...Anon: --% Counter Rolled.
Most Recently Used: 13% 3627289 (mru) [ Return Customer ]
Most Frequently Used: 86% 23429186 (mfu) [ Frequent Customer ]
Most Recently Used Ghost: 17% 4657584 (mru_ghost) [ Return Customer Evicted, Now Back ]
Most Frequently Used Ghost: 32% 8712009 (mfu_ghost) [ Frequent Customer Evicted, Now Back ]
CACHE HITS BY DATA TYPE:
Demand Data: 30% 8308866
Prefetch Data: 0% 0...
2010 Apr 02
0
ZFS behavior under limited resources
...Anon: --% Counter Rolled.
Most Recently Used: 13% 3420349 (mru) [ Return Customer ]
Most Frequently Used: 86% 21237285 (mfu) [ Frequent Customer ]
Most Recently Used Ghost: 16% 4057965 (mru_ghost) [ Return Customer Evicted, Now Back ]
Most Frequently Used Ghost: 31% 7837353 (mfu_ghost) [ Frequent Customer Evicted, Now Back ]
CACHE HITS BY DATA TYPE:
Demand Data: 31% 7793822
Prefetch Data: 0% 0...
2009 Dec 28
0
[storage-discuss] high read iops - more memory for arc?
...? ???Most
> Recently Used:? ? ?
> ???19%? ? ? ? 140478087
> (mru)? ? ? ? [ Return Customer ]
> >? ? ? ? ???Most
> Frequently Used:? ? ???65%?
> ? ? ? 475719362 (mfu)? ? ?
> ? [ Frequent Customer ]
> >? ? ? ? ???Most
> Recently Used Ghost:? ? 2%? ? ?
> ? 20785604 (mru_ghost)???[ Return
> Customer Evicted, Now Back ]
> >? ? ? ? ???Most
> Frequently Used Ghost:? 1%? ? ? ?
> 9920089 (mfu_ghost)? ? [ Frequent Customer
> Evicted, Now Back ]
> >? ? ? ???CACHE HITS BY
> DATA TYPE:
> >? ? ? ? ???Demand
> Data:? ? ? ? ? ? ? ?
> 22%? ? ? ?...
2009 Dec 24
1
high read iops - more memory for arc?
...845266 [ New Customer, First Cache Hit ]
Most Recently Used: 19% 140478087 (mru) [ Return Customer ]
Most Frequently Used: 65% 475719362 (mfu) [ Frequent Customer ]
Most Recently Used Ghost: 2% 20785604 (mru_ghost) [ Return Customer Evicted, Now Back ]
Most Frequently Used Ghost: 1% 9920089 (mfu_ghost) [ Frequent Customer Evicted, Now Back ]
CACHE HITS BY DATA TYPE:
Demand Data: 22% 158852935
Prefetch Data: 17% 12300...
2011 Jan 12
6
ZFS slows down over a couple of days
Hi all,
I have exchanged my Dell R610 in favor of a Sun Fire 4170 M2 which has
32 GB RAM installed. I am running Sol11Expr on this host and I use it to
primarily serve Netatalk AFP shares. From day one, I have noticed that
the amount of free RAM decereased and along with that decrease the
overall performance of ZFS decreased as well.
Now, since I am still quite a Solaris newbie, I seem to
2007 May 29
6
Deterioration with zfs performace and recent zfs bits?
Has anyone else noticed a significant zfs performance deterioration
when running recent opensolaris bits?
My 32-bit / 768 MB Toshiba Tecra S1 notebook was able to do a
full opensolaris release build in ~ 4 hours 45 minutes (gcc shadow
compilation disabled; using an lzjb compressed zpool / zfs on a
single notebook hdd p-ata drive).
After upgrading to 2007-05-25 opensolaris release bits
2007 May 14
37
Lots of overhead with ZFS - what am I doing wrong?
I was trying to simply test bandwidth that Solaris/ZFS (Nevada b63) can deliver from a drive, and doing this:
dd if=(raw disk) of=/dev/null gives me around 80MB/s, while dd if=(file on ZFS) of=/dev/null gives me only 35MB/s!?. I am getting basically the same result whether it is single zfs drive, mirror or a stripe (I am testing with two Seagate 7200.10 320G drives hanging off the same interface