Re: [OmniOS-discuss] ZIL TXG commits happen very frequently - why?

2015-10-14 Thread Rune Tipsmark
__ From: Schweiss, Chip Sent: Wednesday, October 14, 2015 2:44 PM To: Rune Tipsmark Cc: omnios-discuss@lists.omniti.com Subject: Re: [OmniOS-discuss] ZIL TXG commits happen very frequently - why? It all has to do with the write throttle and buffers filling. Here's a great b

Re: [OmniOS-discuss] ZIL TXG commits happen very frequently - why?

2015-10-14 Thread Schweiss, Chip
It all has to do with the write throttle and buffers filling. Here's a great blog post on how it works and how it's tuned: http://dtrace.org/blogs/ahl/2014/02/10/the-openzfs-write-throttle/ http://dtrace.org/blogs/ahl/2014/08/31/openzfs-tuning/ -Chip On Wed, Oct 14, 2015 at 12:45 AM, Rune Ti

[OmniOS-discuss] ZIL TXG commits happen very frequently - why?

2015-10-13 Thread Rune Tipsmark
Hi all. Wondering if anyone could shed some light on why my ZFS pool would perform TXG commits up to 5 times per second. It's set to the default 5 second interval and occasionally it does wait 5 seconds between commits, but only when nearly idle. I'm not sure if this impacts my performance but