On 4/15/2021 9:22 AM, Chris Roose wrote: > I posted this in -questions and someone suggested I post here as well. > > I'm having NFS availability issues between my Proxmox client and FreeBSD > server (10G link) since upgrading to 13-RELEASE. And unfortunately I upgraded > my ZFS pool to v2.0.0 before I noticed the issue, so I'm kind of stuck. > > Periodically, the NFS server (I've tried both v3 and v4.2 clients) will go > unresponsive for several minutes. I never had this problem on 12.2, and as > far as I can tell it's not a disk or network I/O issue. I'll get several > "nfs: server not responding, still trying" messages on the client and a few > minutes later it usually recovers. It's not clear to me yet what's causing > the block. Restarting nfsd on the server will resolve the issue if it doesn't > clear itself. > > Any pointers for troubleshooting this? I've been looking through vmstat, > gstat, top, etc. when the problem occurs, but I haven't been able to pinpoint > the issue. I can get pcap, but it would be from the hosts, because I don't > have a 10G tap or managed switch. >
run `nfsstat -d 1` and try to capture a few lines from before, during, and after the stall, and that may provide some insight. Specifically, does the queue length grow, suggesting it is waiting on the I/O subsystem, or does it just stop getting traffic all together. -- Allan Jude _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
