Peter Radig
2012-Jan-03 22:01 UTC
[zfs-discuss] arc_no_grow is set to 1 and never set back to 0
Hello.
I have a Solaris 11/11 x86 box (which I migrated from SolEx 11/10 a couple of
weeks ago).
Without no obvious reason (at least for me), after an uptime of 1 to 2 days
(observed 3 times now) Solaris sets arc_no_grow to 1 and then never sets it back
to 0. ARC is being shrunk to less than 1 GB -- needless to say that performance
is terrible. There is not much load on this system.
Memory seems to be not an issue (see below).
I looked at the old Nevada code base of onnv_147 and can''t find a
reason for this happening.
How can I find out what''s causing this?
BTW: I was not seeing this on SolEx 11/10.
Thanks,
Peter
*** ::memstat ***
Page Summary Pages MB %Tot
------------ ---------------- ---------------- ----
Kernel 860254 3360 21%
ZFS File Data 3047 11 0%
Anon 38246 149 1%
Exec and libs 3765 14 0%
Page cache 8517 33 0%
Free (cachelist) 5866 22 0%
Free (freelist) 3272317 12782 78%
Total 4192012 16375
Physical 4192011 16375
mem_inuse 4145901568
mem_total 1077466365952
*** ::arc ***
hits = 186279921
misses = 14366462
demand_data_hits = 4648464
demand_data_misses = 8605873
demand_metadata_hits = 171803126
demand_metadata_misses = 3805675
prefetch_data_hits = 772678
prefetch_data_misses = 1464457
prefetch_metadata_hits = 9055653
prefetch_metadata_misses = 490457
mru_hits = 12295087
mru_ghost_hits = 0
mfu_hits = 175281066
mfu_ghost_hits = 0
deleted = 14462192
mutex_miss = 308888
hash_elements = 3752768
hash_elements_max = 3752770
hash_collisions = 11409790
hash_chains = 8256
hash_chain_max = 20
p = 48 MB
c = 781 MB
c_min = 64 MB
c_max = 15351 MB
size = 788 MB
buf_size = 185 MB
data_size = 289 MB
other_size = 313 MB
l2_hits = 0
l2_misses = 14366462
l2_feeds = 0
l2_rw_clash = 0
l2_read_bytes = 0 MB
l2_write_bytes = 0 MB
l2_writes_sent = 0
l2_writes_done = 0
l2_writes_error = 0
l2_writes_hdr_miss = 0
l2_evict_lock_retry = 0
l2_evict_reading = 0
l2_abort_lowmem = 490
l2_cksum_bad = 0
l2_io_error = 0
l2_hdr_size = 0 MB
memory_throttle_count = 0
meta_used = 499 MB
meta_max = 1154 MB
meta_limit = 0 MB
arc_no_grow = 1
arc_tempreserve = 0 MB
Tomas Forsman
2012-Jan-03 23:38 UTC
[zfs-discuss] arc_no_grow is set to 1 and never set back to 0
On 03 January, 2012 - Peter Radig sent me these 3,5K bytes:> Hello. > > I have a Solaris 11/11 x86 box (which I migrated from SolEx 11/10 a couple of weeks ago). > > Without no obvious reason (at least for me), after an uptime of 1 to 2 days (observed 3 times now) Solaris sets arc_no_grow to 1 and then never sets it back to 0. ARC is being shrunk to less than 1 GB -- needless to say that performance is terrible. There is not much load on this system. > > Memory seems to be not an issue (see below). > > I looked at the old Nevada code base of onnv_147 and can''t find a reason for this happening. > > How can I find out what''s causing this?New code that seems to be counting wrong.. I was planning on filing a bug, but am currently struggling to convince oracle that we bought support.. Try this: kstat -n zfs_file_data In my case, I get: free 15322 mem_inuse 24324866048 mem_total 25753026560 .. where ::memstat says: Kernel 2638984 10308 42% ZFS File Data 39260 153 1% Anon 873549 3412 14% Exec and libs 5199 20 0% Page cache 20019 78 0% Free (cachelist) 6608 25 0% Free (freelist) 2703509 10560 43% On another reboot, it refused to go over 130MB on a 24GB system..> BTW: I was not seeing this on SolEx 11/10.Dito.> Thanks, > Peter > > > > *** ::memstat *** > Page Summary Pages MB %Tot > ------------ ---------------- ---------------- ---- > Kernel 860254 3360 21% > ZFS File Data 3047 11 0% > Anon 38246 149 1% > Exec and libs 3765 14 0% > Page cache 8517 33 0% > Free (cachelist) 5866 22 0% > Free (freelist) 3272317 12782 78% > Total 4192012 16375 > Physical 4192011 16375 > > mem_inuse 4145901568 > mem_total 1077466365952 > > *** ::arc *** > hits = 186279921 > misses = 14366462 > demand_data_hits = 4648464 > demand_data_misses = 8605873 > demand_metadata_hits = 171803126 > demand_metadata_misses = 3805675 > prefetch_data_hits = 772678 > prefetch_data_misses = 1464457 > prefetch_metadata_hits = 9055653 > prefetch_metadata_misses = 490457 > mru_hits = 12295087 > mru_ghost_hits = 0 > mfu_hits = 175281066 > mfu_ghost_hits = 0 > deleted = 14462192 > mutex_miss = 308888 > hash_elements = 3752768 > hash_elements_max = 3752770 > hash_collisions = 11409790 > hash_chains = 8256 > hash_chain_max = 20 > p = 48 MB > c = 781 MB > c_min = 64 MB > c_max = 15351 MB > size = 788 MB > buf_size = 185 MB > data_size = 289 MB > other_size = 313 MB > l2_hits = 0 > l2_misses = 14366462 > l2_feeds = 0 > l2_rw_clash = 0 > l2_read_bytes = 0 MB > l2_write_bytes = 0 MB > l2_writes_sent = 0 > l2_writes_done = 0 > l2_writes_error = 0 > l2_writes_hdr_miss = 0 > l2_evict_lock_retry = 0 > l2_evict_reading = 0 > l2_abort_lowmem = 490 > l2_cksum_bad = 0 > l2_io_error = 0 > l2_hdr_size = 0 MB > memory_throttle_count = 0 > meta_used = 499 MB > meta_max = 1154 MB > meta_limit = 0 MB > arc_no_grow = 1 > arc_tempreserve = 0 MB > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss/Tomas -- Tomas Forsman, stric at acc.umu.se, http://www.acc.umu.se/~stric/ |- Student at Computing Science, University of Ume? `- Sysadmin at {cs,acc}.umu.se
Peter Radig
2012-Jan-03 23:50 UTC
[zfs-discuss] arc_no_grow is set to 1 and never set back to 0
Tomas,
Yup, same here.
free 0
mem_inuse 16162750464
mem_total 17171480576
Page Summary Pages MB %Tot
------------ ---------------- ---------------- ----
Kernel 842305 3290 20%
ZFS File Data 2930 11 0%
Anon 44038 172 1%
Exec and libs 3731 14 0%
Page cache 8580 33 0%
Free (cachelist) 5504 21 0%
Free (freelist) 3284924 12831 78%
Total 4192012 16375
Physical 4192011 16375
I will create an SR with Oracle.
Thanks,
Peter
-----Original Message-----
From: Tomas Forsman [mailto:stric at acc.umu.se]
Sent: Mittwoch, 4. Januar 2012 00:39
To: Peter Radig
Cc: zfs-discuss at opensolaris.org
Subject: Re: [zfs-discuss] arc_no_grow is set to 1 and never set back to 0
On 03 January, 2012 - Peter Radig sent me these 3,5K bytes:
> Hello.
>
> I have a Solaris 11/11 x86 box (which I migrated from SolEx 11/10 a couple
of weeks ago).
>
> Without no obvious reason (at least for me), after an uptime of 1 to 2 days
(observed 3 times now) Solaris sets arc_no_grow to 1 and then never sets it back
to 0. ARC is being shrunk to less than 1 GB -- needless to say that performance
is terrible. There is not much load on this system.
>
> Memory seems to be not an issue (see below).
>
> I looked at the old Nevada code base of onnv_147 and can''t find a
reason for this happening.
>
> How can I find out what''s causing this?
New code that seems to be counting wrong.. I was planning on filing a bug, but
am currently struggling to convince oracle that we bought support..
Try this:
kstat -n zfs_file_data
In my case, I get:
free 15322
mem_inuse 24324866048
mem_total 25753026560
.. where ::memstat says:
Kernel 2638984 10308 42%
ZFS File Data 39260 153 1%
Anon 873549 3412 14%
Exec and libs 5199 20 0%
Page cache 20019 78 0%
Free (cachelist) 6608 25 0%
Free (freelist) 2703509 10560 43%
On another reboot, it refused to go over 130MB on a 24GB system..
> BTW: I was not seeing this on SolEx 11/10.
Dito.
> Thanks,
> Peter
>
>
>
> *** ::memstat ***
> Page Summary Pages MB %Tot
> ------------ ---------------- ---------------- ----
> Kernel 860254 3360 21%
> ZFS File Data 3047 11 0%
> Anon 38246 149 1%
> Exec and libs 3765 14 0%
> Page cache 8517 33 0%
> Free (cachelist) 5866 22 0%
> Free (freelist) 3272317 12782 78%
> Total 4192012 16375
> Physical 4192011 16375
>
> mem_inuse 4145901568
> mem_total 1077466365952
>
> *** ::arc ***
> hits = 186279921
> misses = 14366462
> demand_data_hits = 4648464
> demand_data_misses = 8605873
> demand_metadata_hits = 171803126
> demand_metadata_misses = 3805675
> prefetch_data_hits = 772678
> prefetch_data_misses = 1464457
> prefetch_metadata_hits = 9055653
> prefetch_metadata_misses = 490457
> mru_hits = 12295087
> mru_ghost_hits = 0
> mfu_hits = 175281066
> mfu_ghost_hits = 0
> deleted = 14462192
> mutex_miss = 308888
> hash_elements = 3752768
> hash_elements_max = 3752770
> hash_collisions = 11409790
> hash_chains = 8256
> hash_chain_max = 20
> p = 48 MB
> c = 781 MB
> c_min = 64 MB
> c_max = 15351 MB
> size = 788 MB
> buf_size = 185 MB
> data_size = 289 MB
> other_size = 313 MB
> l2_hits = 0
> l2_misses = 14366462
> l2_feeds = 0
> l2_rw_clash = 0
> l2_read_bytes = 0 MB
> l2_write_bytes = 0 MB
> l2_writes_sent = 0
> l2_writes_done = 0
> l2_writes_error = 0
> l2_writes_hdr_miss = 0
> l2_evict_lock_retry = 0
> l2_evict_reading = 0
> l2_abort_lowmem = 490
> l2_cksum_bad = 0
> l2_io_error = 0
> l2_hdr_size = 0 MB
> memory_throttle_count = 0
> meta_used = 499 MB
> meta_max = 1154 MB
> meta_limit = 0 MB
> arc_no_grow = 1
> arc_tempreserve = 0 MB
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss at opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
/Tomas
--
Tomas Forsman, stric at acc.umu.se, http://www.acc.umu.se/~stric/
|- Student at Computing Science, University of Ume?
`- Sysadmin at {cs,acc}.umu.se
David Blasingame
2012-Jan-04 16:35 UTC
[zfs-discuss] arc_no_grow is set to 1 and never set back to 0
Well it looks like the only place this get''s changed is in the
arc_reclaim_thread for opensolaris.? I suppose you could dtrace it to see what
is going on and investigate what is happening to the return code of the
arc_reclaim_needed is.
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/zfs/arc.c#2089
maybe
dtrace -n ''fbt:zfs:arc_reclaim_needed:return { trace(arg1) }''
Dave
-------- Original Message --------
Subject: Re: [zfs-discuss] arc_no_grow is set to 1 and never set back to 0
Date: Tue, 3 Jan 2012 23:50:04 +0000
From: Peter Radig <peter at radig.de>
To: Tomas Forsman <stric at acc.umu.se>
CC: zfs-discuss at opensolaris.org <zfs-discuss at opensolaris.org>
Tomas, Yup, same here. free 0 mem_inuse
16162750464 mem_total 17171480576 Page Summary
Pages MB %Tot
------------ ---------------- ---------------- ----
Kernel 842305 3290 20%
ZFS File Data 2930 11 0%
Anon 44038 172 1%
Exec and libs 3731 14 0%
Page cache 8580 33 0%
Free (cachelist) 5504 21 0%
Free (freelist) 3284924 12831 78% Total
4192012 16375
Physical 4192011 16375 I will create an SR with
Oracle. Thanks,
Peter -----Original Message-----
From: Tomas Forsman [mailto:stric at acc.umu.se]
Sent: Mittwoch, 4. Januar 2012 00:39
To: Peter Radig
Cc: zfs-discuss at opensolaris.org Subject: Re: [zfs-discuss] arc_no_grow is set
to 1 and never set back to 0 On 03 January, 2012 - Peter Radig sent me these
3,5K bytes: > Hello.>
> I have a Solaris 11/11 x86 box (which I migrated from SolEx 11/10 a couple
of weeks ago).
>
> Without no obvious reason (at least for me), after an uptime of 1 to 2 days
(observed 3 times now) Solaris sets arc_no_grow to 1 and then never sets it back
to 0. ARC is being shrunk to less than 1 GB -- needless to say that performance
is terrible. There is not much load on this system.
>
> Memory seems to be not an issue (see below).
>
> I looked at the old Nevada code base of onnv_147 and can''t find a
reason for this happening.
>
> How can I find out what''s causing this? New code that seems to be
counting wrong.. I was planning on filing a bug, but am currently struggling to
convince oracle that we bought support.. Try this:
kstat -n zfs_file_data In my case, I get: free 15322
mem_inuse 24324866048 mem_total
25753026560
.. where ::memstat says:
Kernel 2638984 10308 42%
ZFS File Data 39260 153 1%
Anon 873549 3412 14%
Exec and libs 5199 20 0%
Page cache 20019 78 0%
Free (cachelist) 6608 25 0%
Free (freelist) 2703509 10560 43% On another reboot, it
refused to go over 130MB on a 24GB system.. > BTW: I was not seeing this on
SolEx 11/10. Dito. > Thanks,> Peter
>
>
>
> *** ::memstat ***
> Page Summary Pages MB %Tot
> ------------ ---------------- ---------------- ----
> Kernel 860254 3360 21%
> ZFS File Data 3047 11 0%
> Anon 38246 149 1%
> Exec and libs 3765 14 0%
> Page cache 8517 33 0%
> Free (cachelist) 5866 22 0%
> Free (freelist) 3272317 12782 78%
> Total 4192012 16375
> Physical 4192011 16375
>
> mem_inuse 4145901568
> mem_total 1077466365952
>
> *** ::arc ***
> hits = 186279921
> misses = 14366462
> demand_data_hits = 4648464
> demand_data_misses = 8605873
> demand_metadata_hits = 171803126
> demand_metadata_misses = 3805675
> prefetch_data_hits = 772678
> prefetch_data_misses = 1464457
> prefetch_metadata_hits = 9055653
> prefetch_metadata_misses = 490457
> mru_hits = 12295087
> mru_ghost_hits = 0
> mfu_hits = 175281066
> mfu_ghost_hits = 0
> deleted = 14462192
> mutex_miss = 308888
> hash_elements = 3752768
> hash_elements_max = 3752770
> hash_collisions = 11409790
> hash_chains = 8256
> hash_chain_max = 20
> p = 48 MB
> c = 781 MB
> c_min = 64 MB
> c_max = 15351 MB
> size = 788 MB
> buf_size = 185 MB
> data_size = 289 MB
> other_size = 313 MB
> l2_hits = 0
> l2_misses = 14366462
> l2_feeds = 0
> l2_rw_clash = 0
> l2_read_bytes = 0 MB
> l2_write_bytes = 0 MB
> l2_writes_sent = 0
> l2_writes_done = 0
> l2_writes_error = 0
> l2_writes_hdr_miss = 0
> l2_evict_lock_retry = 0
> l2_evict_reading = 0
> l2_abort_lowmem = 490
> l2_cksum_bad = 0
> l2_io_error = 0
> l2_hdr_size = 0 MB
> memory_throttle_count = 0
> meta_used = 499 MB
> meta_max = 1154 MB
> meta_limit = 0 MB
> arc_no_grow = 1
> arc_tempreserve = 0 MB
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss at opensolaris.org >
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss /Tomas
--
Tomas Forsman, stric at acc.umu.se, http://www.acc.umu.se/~stric/ |- Student at
Computing Science, University of Ume?
`- Sysadmin at {cs,acc}.umu.se
_______________________________________________
zfs-discuss mailing list zfs-discuss at opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
-------------- next part --------------
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Peter Radig
2012-Jan-04 16:49 UTC
[zfs-discuss] arc_no_grow is set to 1 and never set back to 0
Thanks. The guys from Oracle are currently looking at some new code that was
introduced in arc_reclaim_thread() between b151a and b175.
Peter Radig, Ahornstrasse 34, 85774 Unterf?hring, Germany
tel: +49 89 99536751 - fax: +49 89 99536754 - mobile: +49 171 2652977
email: peter at radig.de<mailto:peter at radig.de>
From: David Blasingame [mailto:dblasin at yahoo.com]
Sent: Mittwoch, 4. Januar 2012 17:35
To: Peter Radig; stric at acc.umu.se
Cc: zfs-discuss at opensolaris.org
Subject: Re: [zfs-discuss] arc_no_grow is set to 1 and never set back to 0
Well it looks like the only place this get''s changed is in the
arc_reclaim_thread for opensolaris. I suppose you could dtrace it to see what
is going on and investigate what is happening to the return code of the
arc_reclaim_needed is.
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/zfs/arc.c#2089
maybe
dtrace -n ''fbt:zfs:arc_reclaim_needed:return { trace(arg1) }''
Dave
-------- Original Message --------
Subject:
Re: [zfs-discuss] arc_no_grow is set to 1 and never set back to 0
Date:
Tue, 3 Jan 2012 23:50:04 +0000
From:
Peter Radig <peter at radig.de><mailto:peter at radig.de>
To:
Tomas Forsman <stric at acc.umu.se><mailto:stric at acc.umu.se>
CC:
zfs-discuss at opensolaris.org<mailto:zfs-discuss at opensolaris.org>
<zfs-discuss at opensolaris.org><mailto:zfs-discuss at
opensolaris.org>
Tomas,
Yup, same here.
free 0
mem_inuse 16162750464
mem_total 17171480576
Page Summary Pages MB %Tot
------------ ---------------- ---------------- ----
Kernel 842305 3290 20%
ZFS File Data 2930 11 0%
Anon 44038 172 1%
Exec and libs 3731 14 0%
Page cache 8580 33 0%
Free (cachelist) 5504 21 0%
Free (freelist) 3284924 12831 78%
Total 4192012 16375
Physical 4192011 16375
I will create an SR with Oracle.
Thanks,
Peter
-----Original Message-----
From: Tomas Forsman [mailto:stric at acc.umu.se]
Sent: Mittwoch, 4. Januar 2012 00:39
To: Peter Radig
Cc: zfs-discuss at opensolaris.org<mailto:zfs-discuss at opensolaris.org>
Subject: Re: [zfs-discuss] arc_no_grow is set to 1 and never set back to 0
On 03 January, 2012 - Peter Radig sent me these 3,5K bytes:
> Hello.
>
> I have a Solaris 11/11 x86 box (which I migrated from SolEx 11/10 a couple
of weeks ago).
>
> Without no obvious reason (at least for me), after an uptime of 1 to 2 days
(observed 3 times now) Solaris sets arc_no_grow to 1 and then never sets it back
to 0. ARC is being shrunk to less than 1 GB -- needless to say that performance
is terrible. There is not much load on this system.
>
> Memory seems to be not an issue (see below).
>
> I looked at the old Nevada code base of onnv_147 and can''t find a
reason for this happening.
>
> How can I find out what''s causing this?
New code that seems to be counting wrong.. I was planning on filing a bug, but
am currently struggling to convince oracle that we bought support..
Try this:
kstat -n zfs_file_data
In my case, I get:
free 15322
mem_inuse 24324866048
mem_total 25753026560
.. where ::memstat says:
Kernel 2638984 10308 42%
ZFS File Data 39260 153 1%
Anon 873549 3412 14%
Exec and libs 5199 20 0%
Page cache 20019 78 0%
Free (cachelist) 6608 25 0%
Free (freelist) 2703509 10560 43%
On another reboot, it refused to go over 130MB on a 24GB system..
> BTW: I was not seeing this on SolEx 11/10.
Dito.
> Thanks,
> Peter
>
>
>
> *** ::memstat ***
> Page Summary Pages MB %Tot
> ------------ ---------------- ---------------- ----
> Kernel 860254 3360 21%
> ZFS File Data 3047 11 0%
> Anon 38246 149 1%
> Exec and libs 3765 14 0%
> Page cache 8517 33 0%
> Free (cachelist) 5866 22 0%
> Free (freelist) 3272317 12782 78%
> Total 4192012 16375
> Physical 4192011 16375
>
> mem_inuse 4145901568
> mem_total 1077466365952
>
> *** ::arc ***
> hits = 186279921
> misses = 14366462
> demand_data_hits = 4648464
> demand_data_misses = 8605873
> demand_metadata_hits = 171803126
> demand_metadata_misses = 3805675
> prefetch_data_hits = 772678
> prefetch_data_misses = 1464457
> prefetch_metadata_hits = 9055653
> prefetch_metadata_misses = 490457
> mru_hits = 12295087
> mru_ghost_hits = 0
> mfu_hits = 175281066
> mfu_ghost_hits = 0
> deleted = 14462192
> mutex_miss = 308888
> hash_elements = 3752768
> hash_elements_max = 3752770
> hash_collisions = 11409790
> hash_chains = 8256
> hash_chain_max = 20
> p = 48 MB
> c = 781 MB
> c_min = 64 MB
> c_max = 15351 MB
> size = 788 MB
> buf_size = 185 MB
> data_size = 289 MB
> other_size = 313 MB
> l2_hits = 0
> l2_misses = 14366462
> l2_feeds = 0
> l2_rw_clash = 0
> l2_read_bytes = 0 MB
> l2_write_bytes = 0 MB
> l2_writes_sent = 0
> l2_writes_done = 0
> l2_writes_error = 0
> l2_writes_hdr_miss = 0
> l2_evict_lock_retry = 0
> l2_evict_reading = 0
> l2_abort_lowmem = 490
> l2_cksum_bad = 0
> l2_io_error = 0
> l2_hdr_size = 0 MB
> memory_throttle_count = 0
> meta_used = 499 MB
> meta_max = 1154 MB
> meta_limit = 0 MB
> arc_no_grow = 1
> arc_tempreserve = 0 MB
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss at opensolaris.org<mailto:zfs-discuss at opensolaris.org>
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
/Tomas
--
Tomas Forsman, stric at acc.umu.se<mailto:stric at acc.umu.se>,
http://www.acc.umu.se/~stric/<http://www.acc.umu.se/%7Estric/>
|- Student at Computing Science, University of Ume?
`- Sysadmin at {cs,acc}.umu.se
_______________________________________________
zfs-discuss mailing list
zfs-discuss at opensolaris.org<mailto:zfs-discuss at opensolaris.org>
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
-------------- next part --------------
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Richard Elling
2012-Jan-04 18:12 UTC
[zfs-discuss] arc_no_grow is set to 1 and never set back to 0
On Jan 4, 2012, at 8:49 AM, Peter Radig wrote:> Thanks. The guys from Oracle are currently looking at some new code that was introduced in arc_reclaim_thread() between b151a and b175.Closed source strategy loses again! -- richard> > Peter Radig, Ahornstrasse 34, 85774 Unterf?hring, Germany > tel: +49 89 99536751 - fax: +49 89 99536754 - mobile: +49 171 2652977 > email: peter at radig.de > > From: David Blasingame [mailto:dblasin at yahoo.com] > Sent: Mittwoch, 4. Januar 2012 17:35 > To: Peter Radig; stric at acc.umu.se > Cc: zfs-discuss at opensolaris.org > Subject: Re: [zfs-discuss] arc_no_grow is set to 1 and never set back to 0 > > > Well it looks like the only place this get''s changed is in the arc_reclaim_thread for opensolaris. I suppose you could dtrace it to see what is going on and investigate what is happening to the return code of the arc_reclaim_needed is. > > http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/zfs/arc.c#2089 > > maybe > > dtrace -n ''fbt:zfs:arc_reclaim_needed:return { trace(arg1) }'' > > Dave > > > -------- Original Message -------- > Subject: > Re: [zfs-discuss] arc_no_grow is set to 1 and never set back to 0 > Date: > Tue, 3 Jan 2012 23:50:04 +0000 > From: > Peter Radig <peter at radig.de> > To: > Tomas Forsman <stric at acc.umu.se> > CC: > zfs-discuss at opensolaris.org <zfs-discuss at opensolaris.org> > > > Tomas, > > Yup, same here. > > free 0 > mem_inuse 16162750464 > mem_total 17171480576 > > Page Summary Pages MB %Tot > ------------ ---------------- ---------------- ---- > Kernel 842305 3290 20% > ZFS File Data 2930 11 0% > Anon 44038 172 1% > Exec and libs 3731 14 0% > Page cache 8580 33 0% > Free (cachelist) 5504 21 0% > Free (freelist) 3284924 12831 78% > > Total 4192012 16375 > Physical 4192011 16375 > > > I will create an SR with Oracle. > > Thanks, > Peter > > -----Original Message----- > From: Tomas Forsman [mailto:stric at acc.umu.se] > Sent: Mittwoch, 4. Januar 2012 00:39 > To: Peter Radig > Cc: zfs-discuss at opensolaris.org > Subject: Re: [zfs-discuss] arc_no_grow is set to 1 and never set back to 0 > > On 03 January, 2012 - Peter Radig sent me these 3,5K bytes: > > > Hello. > > > > I have a Solaris 11/11 x86 box (which I migrated from SolEx 11/10 a couple of weeks ago). > > > > Without no obvious reason (at least for me), after an uptime of 1 to 2 days (observed 3 times now) Solaris sets arc_no_grow to 1 and then never sets it back to 0. ARC is being shrunk to less than 1 GB -- needless to say that performance is terrible. There is not much load on this system. > > > > Memory seems to be not an issue (see below). > > > > I looked at the old Nevada code base of onnv_147 and can''t find a reason for this happening. > > > > How can I find out what''s causing this? > > New code that seems to be counting wrong.. I was planning on filing a bug, but am currently struggling to convince oracle that we bought support.. > > Try this: > kstat -n zfs_file_data > > In my case, I get: > free 15322 > mem_inuse 24324866048 > mem_total 25753026560 > .. where ::memstat says: > Kernel 2638984 10308 42% > ZFS File Data 39260 153 1% > Anon 873549 3412 14% > Exec and libs 5199 20 0% > Page cache 20019 78 0% > Free (cachelist) 6608 25 0% > Free (freelist) 2703509 10560 43% > > On another reboot, it refused to go over 130MB on a 24GB system.. > > > > BTW: I was not seeing this on SolEx 11/10. > > Dito. > > > Thanks, > > Peter > > > > > > > > *** ::memstat *** > > Page Summary Pages MB %Tot > > ------------ ---------------- ---------------- ---- > > Kernel 860254 3360 21% > > ZFS File Data 3047 11 0% > > Anon 38246 149 1% > > Exec and libs 3765 14 0% > > Page cache 8517 33 0% > > Free (cachelist) 5866 22 0% > > Free (freelist) 3272317 12782 78% > > Total 4192012 16375 > > Physical 4192011 16375 > > > > mem_inuse 4145901568 > > mem_total 1077466365952 > > > > *** ::arc *** > > hits = 186279921 > > misses = 14366462 > > demand_data_hits = 4648464 > > demand_data_misses = 8605873 > > demand_metadata_hits = 171803126 > > demand_metadata_misses = 3805675 > > prefetch_data_hits = 772678 > > prefetch_data_misses = 1464457 > > prefetch_metadata_hits = 9055653 > > prefetch_metadata_misses = 490457 > > mru_hits = 12295087 > > mru_ghost_hits = 0 > > mfu_hits = 175281066 > > mfu_ghost_hits = 0 > > deleted = 14462192 > > mutex_miss = 308888 > > hash_elements = 3752768 > > hash_elements_max = 3752770 > > hash_collisions = 11409790 > > hash_chains = 8256 > > hash_chain_max = 20 > > p = 48 MB > > c = 781 MB > > c_min = 64 MB > > c_max = 15351 MB > > size = 788 MB > > buf_size = 185 MB > > data_size = 289 MB > > other_size = 313 MB > > l2_hits = 0 > > l2_misses = 14366462 > > l2_feeds = 0 > > l2_rw_clash = 0 > > l2_read_bytes = 0 MB > > l2_write_bytes = 0 MB > > l2_writes_sent = 0 > > l2_writes_done = 0 > > l2_writes_error = 0 > > l2_writes_hdr_miss = 0 > > l2_evict_lock_retry = 0 > > l2_evict_reading = 0 > > l2_abort_lowmem = 490 > > l2_cksum_bad = 0 > > l2_io_error = 0 > > l2_hdr_size = 0 MB > > memory_throttle_count = 0 > > meta_used = 499 MB > > meta_max = 1154 MB > > meta_limit = 0 MB > > arc_no_grow = 1 > > arc_tempreserve = 0 MB > > _______________________________________________ > > zfs-discuss mailing list > > zfs-discuss at opensolaris.org > > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > > > /Tomas > -- > Tomas Forsman, stric at acc.umu.se, http://www.acc.umu.se/~stric/ > |- Student at Computing Science, University of Ume? > `- Sysadmin at {cs,acc}.umu.se > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss-- ZFS and performance consulting http://www.RichardElling.com illumos meetup, Jan 10, 2012, Menlo Park, CA http://www.meetup.com/illumos-User-Group/events/41665962/
Steve Gonczi
2012-Jan-04 19:56 UTC
[zfs-discuss] arc_no_grow is set to 1 and never set back to 0
The interesting bit is what happens inside arc_reclaim_needed(),
that is, how it arrives at the conclusion that there is memory pressure.
Maybe we could trace arg0, which gives the location where
we have left the function. This would finger which return path
arc_reclaim_needed() took.
Steve
----- Original Message -----
Well it looks like the only place this get''s changed is in the
arc_reclaim_thread for opensolaris. I suppose you could dtrace it to see what is
going on and investigate what is happening to the return code of the
arc_reclaim_needed is.
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/zfs/arc.c#2089
maybe
dtrace -n ''fbt:zfs:arc_reclaim_needed:return { trace(arg1) }''
Dave
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Tomas Forsman
2012-Jan-05 09:35 UTC
[zfs-discuss] arc_no_grow is set to 1 and never set back to 0
On 04 January, 2012 - Steve Gonczi sent me these 2,5K bytes:> The interesting bit is what happens inside arc_reclaim_needed(), > that is, how it arrives at the conclusion that there is memory pressure. > > Maybe we could trace arg0, which gives the location where > we have left the function. This would finger which return path > arc_reclaim_needed() took.It''s new code, basically comparing the inuse/total/free from kstat -n zfs_file_data, which seems buggered.> Steve > > > ----- Original Message ----- > > > > Well it looks like the only place this get''s changed is in the arc_reclaim_thread for opensolaris. I suppose you could dtrace it to see what is going on and investigate what is happening to the return code of the arc_reclaim_needed is. > > > > http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/zfs/arc.c#2089 > > > maybe > > > dtrace -n ''fbt:zfs:arc_reclaim_needed:return { trace(arg1) }'' > > > Dave > > > > >/Tomas -- Tomas Forsman, stric at acc.umu.se, http://www.acc.umu.se/~stric/ |- Student at Computing Science, University of Ume? `- Sysadmin at {cs,acc}.umu.se
Peter Radig
2012-Jan-05 19:59 UTC
[zfs-discuss] arc_no_grow is set to 1 and never set back to 0
It''s supposed to be 7111576: arc shrinks in the absence of memory pressure currently in status "accepted" and an RPE escalation pending. -----Original Message----- From: zfs-discuss-bounces at opensolaris.org [mailto:zfs-discuss-bounces at opensolaris.org] On Behalf Of Tomas Forsman Sent: Donnerstag, 5. Januar 2012 10:35 To: zfs-discuss at opensolaris.org Subject: Re: [zfs-discuss] arc_no_grow is set to 1 and never set back to 0 On 04 January, 2012 - Steve Gonczi sent me these 2,5K bytes:> The interesting bit is what happens inside arc_reclaim_needed(), that > is, how it arrives at the conclusion that there is memory pressure. > > Maybe we could trace arg0, which gives the location where we have left > the function. This would finger which return path > arc_reclaim_needed() took.It''s new code, basically comparing the inuse/total/free from kstat -n zfs_file_data, which seems buggered.> Steve > > > ----- Original Message ----- > > > > Well it looks like the only place this get''s changed is in the arc_reclaim_thread for opensolaris. I suppose you could dtrace it to see what is going on and investigate what is happening to the return code of the arc_reclaim_needed is. > > > > http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/comm > on/fs/zfs/arc.c#2089 > > > maybe > > > dtrace -n ''fbt:zfs:arc_reclaim_needed:return { trace(arg1) }'' > > > Dave > > > > >/Tomas -- Tomas Forsman, stric at acc.umu.se, http://www.acc.umu.se/~stric/ |- Student at Computing Science, University of Ume? `- Sysadmin at {cs,acc}.umu.se _______________________________________________ zfs-discuss mailing list zfs-discuss at opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Clemens Kalb
2012-Jan-19 12:09 UTC
[zfs-discuss] arc_no_grow is set to 1 and never set back to 0
Peter, I experience the same issue w/ 2 systems upgraded from Solaris 11 Express to Solaris 11 11/11. Has your SR with Oracle made any progress since your last post? Thanks> It''s supposed to be > > 7111576: arc shrinks in the absence of memory pressure > > currently in status "accepted" and an RPE escalation pending.Clemens Kalb Leiter netlogix Media Telefon: +49 (911) 539909 - 0 E-Mail: Clemens.Kalb at netlogix.de Website: media.netlogix.de -- netlogix GmbH & Co. KG IT-Services | IT-Training | Media Andernacher Stra?e 53 | 90411 N?rnberg Telefon: +49 (911) 539909 - 0 | Fax: +49 (911) 539909 - 99 E-Mail: info at netlogix.de | Internet: http://www.netlogix.de netlogix GmbH & Co. KG ist eingetragen am Amtsgericht N?rnberg (HRA 13338) Pers?nlich haftende Gesellschafterin: netlogix Verwaltungs GmbH (HRB 20634) Umsatzsteuer-Identifikationsnummer: DE 233472254 Gesch?ftsf?hrer: Stefan Buchta, Matthias Schmidt
Tomas Forsman
2012-Jan-19 15:47 UTC
[zfs-discuss] arc_no_grow is set to 1 and never set back to 0
On 19 January, 2012 - Clemens Kalb sent me these 1,1K bytes:> Peter, > > I experience the same issue w/ 2 systems upgraded from Solaris 11 > Express to Solaris 11 11/11. Has your SR with Oracle made any > progress since your last post?Target solaris_11 Customer Status 3-Accepted Severity 2-High Last Updated 2012-01-07 00:00:00 GMT+00:00 I''ve filed an SR pointing at the same bug too, to get momentum. /Tomas -- Tomas Forsman, stric at acc.umu.se, http://www.acc.umu.se/~stric/ |- Student at Computing Science, University of Ume? `- Sysadmin at {cs,acc}.umu.se
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