That's for pointing me towards that site! Saying that "txg_synctime_ms" controls zfs's breathing was how I was thinking about it. Great way to describe it! Unfortunately setting txg_synctime_ms to 1000 or even 1 didn't make an improvement.
I tried adding the "disable-ohci=true" to the GRUB boot menu via SSH and it didn't come back from it's reboot so I'm not going to be able to due much more tonight (I'm working remotely). I do notice that when the ARC size reaches capacity, that's when things slow down. Also, it never appears to drop after I kill the IO. If I stop all IO, arcstat shows all numbers but the arcsz drop. Should arcsz drop at all? On Mon, Nov 15, 2010 at 7:27 PM, Khushil Dep <khushil....@gmail.com> wrote: > That controls zfs breathing, I'm on a phone writing this so u hope you > won't mind me pointing you to > listware.net/201005/opensolaris-zfs/115564-zfs-discuss-small-stalls-slowing-down-rsync-from-holding-network-saturation-every-5-seconds.html > > On 16 Nov 2010 00:20, "Louis Carreiro" <carreir...@gmail.com> wrote: > Almost! It seems like it held out a bit further than last time. Now "arcsz" > hit's 2G (matching 'c'). But it still drops off. It started at 5.6GB/Min and > fell off to less than 700MB/Min. > > A snippet of my arcstat.pl output looks like the following: > > Time read miss miss% dmis dm% pmis pm% mmis mm% arcsz c > 19:14:31 14K 283 1 283 2 0 0 283 1 2G 2G > 19:14:32 45K 120 0 102 0 18 0 120 0 2G 2G > 19:14:33 9K 228 2 213 2 15 0 223 2 2G 2G > 19:14:34 14K 285 2 274 2 11 0 285 2 2G 2G > 19:14:35 14K 294 1 276 2 18 0 294 1 2G 2G > > The above is what it looks like when my speed falls off. Is txg_synctime_ms > something I can tweek or is what you suggested a normal value? I've read a > few articles that have mentioned values lower than 12288 ms. > > > > On Mon, Nov 15, 2010 at 6:35 PM, Khushil Dep <khushil....@gmail.com> > wrote: > > > > Set your txg_synct... > >
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