On Thu, Apr 11, 2024 at 03:36:29PM +0200, Federico Giannici wrote: > On 4/11/24 14:12, Nick Holland wrote: > > On 4/11/24 05:47, Federico Giannici wrote: > > > We have a server with A LOT of files in some directories (an email > > > server in maildir format). > > > > > > Since we upgraded from OpenBSD amd64 7.3 to 7.5 (passing through 7.4) it > > > became very very very slow to access these large directories! > > ,,, > > You may be being bitten by the removal of softdeps (soft updates) > > in 7.4 more than the availability of a knob to twist. This was a > > huge hit for some things -- I had one backup job go from a couple > > hours to eight or so hours. However, it turned out that increase > > in time has not inconvenienced me at all, and some random lockups > > related to softdeps have gone away. Overall, win for me (the > > fscks after a lockup took hours, too, not to mention all the time > > and effort spent replacing part after part assuming it was a HW > > issue). > > > > As I understand it...there were known (known unknown?) bugs in the > > softdep code, the code was ugly, and it made it difficult to > > actually improve the code. > > No, we knew that softdeps were being deprecated and we removed from > everywhere some time ago. It must be something else. > > Anyway, it's strange that dirhash parameters has being changed and removed > without any mention...
It was not (this is on -current amd64): vfs.ffs.dirhash_dirsize=2560 vfs.ffs.dirhash_maxmem=5242880 vfs.ffs.dirhash_mem=4832510 Are you sure your kernel and userland are in sync? -- :wq Claudio
