Re: zfs, a directory that used to hold lot of files and listing pause

2016-10-20 Thread Nicolas Gilles
On Thu, Oct 20, 2016 at 3:47 PM, Eugene M. Zheganin wrote: > Hi. > > I have FreeBSD 10.2-STABLE r289293 (but I have observed this situation on > different releases) and a zfs. I also have one directory that used to have a > lot of (tens of thousands) files. I surely takes a lot of time to get a >

Re: ZFS, SSDs, and TRIM performance

2015-11-03 Thread Nicolas Gilles
Not sure about the Samsung XS1715, but lots of SSDs seem to suck at large amounts of TRIM in general leading a "let me pause everything for a while" symptom. In fact I think there is work in ZFS to make TRIMs work better, and to throttle them in case large amounts are freed to avoid this kind of st