> ZFS 11.0 on Solaris release 06/06, hangs systems when > trying to copy files from my VXFS 4.1 file system. > any ideas what this problem could be?.What kind of system is that? How much memory is installed? I''m able to hang an Ultra 60 with 256 MByte of main memory, simply by writing big files to a ZFS filesystem. The problem happens with both Solaris 10 6/2006 and Solaris Express snv_48. In my case there seems to be a problem with ZFS'' ARC cache, which is not returning memory to the kernel, when free memory gets low. Instead, ZFS'' ARC cache data structures keeps growing until the machine is running out of kernel memory. At this point the machine hangs, lots of kernel threads are waiting for free memory, and the box must be power cycled (Well, unpluging and re-connecting the type 5 keyboard works and gets me to the OBP, where I can force a system crashdump and reboot). This message posted from opensolaris.org
J??rgen Keil writes: > > ZFS 11.0 on Solaris release 06/06, hangs systems when > > trying to copy files from my VXFS 4.1 file system. > > any ideas what this problem could be?. > > What kind of system is that? How much memory is installed? > > I''m able to hang an Ultra 60 with 256 MByte of main memory, > simply by writing big files to a ZFS filesystem. The problem > happens with both Solaris 10 6/2006 and Solaris Express snv_48. > > In my case there seems to be a problem with ZFS'' ARC cache, > which is not returning memory to the kernel, when free memory > gets low. Instead, ZFS'' ARC cache data structures keeps growing > until the machine is running out of kernel memory. At this point > the machine hangs, lots of kernel threads are waiting for free memory, > and the box must be power cycled (Well, unpluging and re-connecting > the type 5 keyboard works and gets me to the OBP, where I can force > a system crashdump and reboot). > > > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss Seems like: 6429205 each zpool needs to monitor it''s throughput and throttle heavy writers (also fixes: 6415647 Sequential writing is jumping) -r
Sounds familiar. Yes it is a small system a Sun blade 100 with 128MB of memory. I guess I need to install more memory in this baby. I just very surprised that ZFS will required so much to accomplish just a simple task as a copy. From your experience I can tell might be a memory related issue. Thanks for you response. Edmundo ----- Original Message ----- From: "Roch - PAE" <Roch.Bourbonnais at Sun.COM> To: "J?rgen Keil" <jk at tools.de> Cc: <zfs-discuss at opensolaris.org> Sent: Thursday, October 26, 2006 8:28 AM Subject: Re: [zfs-discuss] Re: ZFS hangs systems during copy J??rgen Keil writes: > > ZFS 11.0 on Solaris release 06/06, hangs systems when > > trying to copy files from my VXFS 4.1 file system. > > any ideas what this problem could be?. > > What kind of system is that? How much memory is installed? > > I''m able to hang an Ultra 60 with 256 MByte of main memory, > simply by writing big files to a ZFS filesystem. The problem > happens with both Solaris 10 6/2006 and Solaris Express snv_48. > > In my case there seems to be a problem with ZFS'' ARC cache, > which is not returning memory to the kernel, when free memory > gets low. Instead, ZFS'' ARC cache data structures keeps growing > until the machine is running out of kernel memory. At this point > the machine hangs, lots of kernel threads are waiting for free memory, > and the box must be power cycled (Well, unpluging and re-connecting > the type 5 keyboard works and gets me to the OBP, where I can force > a system crashdump and reboot). > > > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss Seems like: 6429205 each zpool needs to monitor it''s throughput and throttle heavy writers (also fixes: 6415647 Sequential writing is jumping) -r _______________________________________________ zfs-discuss mailing list zfs-discuss at opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
I have reported similar issues with ZFS taking most of my 2G in one system and 3G in another. I have been told to add a swap partition which I normally do not do. It mostly has cleared up the problem however I am still bugged by needing to do that in the first place. ZFS memory management seems like it needs a bit of work still. Hmm, I cannot find the thread in the zfs-discuss archives, the subject was "zfs sucking down my memory". --joe J?rgen Keil wrote:>> ZFS 11.0 on Solaris release 06/06, hangs systems when >> trying to copy files from my VXFS 4.1 file system. >> any ideas what this problem could be?. >> > > What kind of system is that? How much memory is installed? > > I''m able to hang an Ultra 60 with 256 MByte of main memory, > simply by writing big files to a ZFS filesystem. The problem > happens with both Solaris 10 6/2006 and Solaris Express snv_48. > > In my case there seems to be a problem with ZFS'' ARC cache, > which is not returning memory to the kernel, when free memory > gets low. Instead, ZFS'' ARC cache data structures keeps growing > until the machine is running out of kernel memory. At this point > the machine hangs, lots of kernel threads are waiting for free memory, > and the box must be power cycled (Well, unpluging and re-connecting > the type 5 keyboard works and gets me to the OBP, where I can force > a system crashdump and reboot). > > > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss >