<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><br><div><div>On Nov 5, 2014, at 12:42 PM, Schweiss, Chip via illumos-discuss <<a href="mailto:discuss@lists.illumos.org">discuss@lists.illumos.org</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Nov 5, 2014 at 2:36 PM, Dan McDonald <span dir="ltr"><<a href="mailto:danmcd@omniti.com" target="_blank">danmcd@omniti.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
> On Nov 5, 2014, at 3:31 PM, Schweiss, Chip via illumos-discuss <<a href="mailto:discuss@lists.illumos.org">discuss@lists.illumos.org</a>> wrote:<br>
><br>
> I had a system crash this morning when I/O on a pool was hung with failmode=panic.<br><br></span>What version of OmniOS are you running?<br></blockquote><div><br></div><div>r1510010<br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
> That was 7 1/2 hours ago and it's at 64%. I'm going to let it complete so the failure can be analyzed more, but I really need to find a way to significantly speed up the crash dumps.<br>
><br>
> This system has 256GB ram and a dedicated dump pool of two 320GB mirrored SATA disks.<br>
><br>
> I'm aware of the multi-threaded dump issue so I have these to lines in /etc/system<br>
><br>
> set dump_plat_mincpu=0<br><br></span>That should be the default now. I can't remember which rev of OmniOS it showed up in, but certainly it's in 010 or later.<br><span class=""><br>
> It's not clear where the bottleneck is. I don't think it's the disk. The disk activity lights are a light flicker, by no means being hit hard. Unless it's a serial latency issue.<br>
><br>
> What would be my best approach to get good dumps from a system like this in minutes, not hours? Assuming that is possible.<br><br></span>You weren't dumping to the same pool or the same controller where you had the I/O hang, were you?<br></blockquote><div><br></div><div>No, I setup a dedicated dump pool to a pair of mirrored SATA disks connected to the motherboard AHCI controller. <br></div></div></div></div></blockquote><div><br></div><div>Try dumping to a raw slice instead of ZFS.</div><div> -- richard</div><br><blockquote type="cite"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div><br></div><div>-Chip<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="HOEnZb"><font color="#888888"><br>
Dan<br><br></font></span></blockquote></div><br></div></div><div bgcolor="#ffffff" style="width:auto;margin:0;padding:5px;background-color:#fff;clear:both;border-top: 1px solid #ccc;"><table bgcolor="#ffffff" border="0" cellpadding="0" cellspacing="0" style="background-color:#fff" width="100%"><tbody><tr><td padding="4px"><font color="#333333" size="1" style="font-family:helvetica, sans-serif;">
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