Date: Thu, 25 Nov 2010 14:28:35 -0600 From: Adam Vande More <amvandemore@gmail.com> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org, Andriy Gapon <avg@freebsd.org> Subject: Re: top io mode Message-ID: <AANLkTinVq8f6miLjqePEBOjN3CfhZJcPf%2B8njiKwTaL3@mail.gmail.com> In-Reply-To: <20101125200813.GA56066@icarus.home.lan> References: <AANLkTikrKevf3x4nyi6=8Yz0BW=yZzf0W_Xa3XGQXy8N@mail.gmail.com> <4CEE88D9.4070200@DataIX.net> <AANLkTincWrdhq3my_RARtB17mneT77YZubQbFCN1Swzp@mail.gmail.com> <20101125200813.GA56066@icarus.home.lan>
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On Thu, Nov 25, 2010 at 2:08 PM, Jeremy Chadwick <freebsd@jdc.parodius.com>wrote: > > Well the top bug didn't seem to resolve my actual issue and yes it it a > > complete ZFS system. Problem is that the HD activity indicator light is > > constantly flickering even though should be minimal activity. top still > > shows no activity around the blinks, and there's no swapping happening > > although gstat does seem to roughly match the blinks. I can't tell what > > your patch does, would it enable me to see what's touching the disk? > > Please try using gstat(8) instead. > Like I said gstat shows activity, but I have no way find what process is causing the activity unless there is some hidden gstat option I'm unaware of. to be more clear, if I have top -m io in one terminal, I see no movement in the READ/WRITE columns. while polling gstat output I captured an IO "spike" http://pastebin.com/f84nuzxt the percent busy is at 0.00 for every entry with the exception of these spikes. -- Adam Vande More
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