Hey all. I have a system that I’m trying to do some intensive CPU and I/O on.
FreeBSD 13.0-RELEASE, amd64, 128GB RAM, hardware RAID1 OS volume, and a large
(40TB) zpool where most of the I/O is happening.
Initially, it was failing for me because it was running out of swap space. It
had only the normal small (4-8G) swap partition, so I resized the filesystems
on the root disk and now have 400+GB swap. The system had frozen up and I
wasn’t able to log in. When I go to the console, I find a long list of:
swap_pager: cannot allocate bio
lines. I was able to log into the console as root and pstat -s shows the swap
minimally used (7.5GB used). Attempting a “zpool status” at that point locked
up. I don’t know if the problem is the memory subsystem, or zfs.
But, based on the error, is there perhaps some kernel parameter I can tune that
might prevent the swap pager from encountering that error?
- Chris
