I've updated two machines to the latest release of 12 and have an unusual behavior on one.
The first isn't used much and has 32 GB RAM but behaves the same now as it did before the update. Performance and behavior are familiar.
The second machine has 160 GB RAM and shows 120+ free regardless of disk access and caching expectations. Despite the large free memory pool the machine seems to want to touch swap lightly. The ARC is showing ~8 GB and is really not growing. The performance of the machine is acting like there is a shortage of cache with the disks being accessed more frequently than was normal under 11.3. Monitoring the drives with gstat shows disks that are often pegged at 100% with high ops and low throughput. I've added an L2 ARC which grew for awhile then stalled out short of the disk capacity. Something appears to be wrong with this box but I'm at a loss where to look. Other than performance all functionality seems okay with VMs, jails and file sharing services working as expected, just slower.
Any suggestions are welcome.
The first isn't used much and has 32 GB RAM but behaves the same now as it did before the update. Performance and behavior are familiar.
The second machine has 160 GB RAM and shows 120+ free regardless of disk access and caching expectations. Despite the large free memory pool the machine seems to want to touch swap lightly. The ARC is showing ~8 GB and is really not growing. The performance of the machine is acting like there is a shortage of cache with the disks being accessed more frequently than was normal under 11.3. Monitoring the drives with gstat shows disks that are often pegged at 100% with high ops and low throughput. I've added an L2 ARC which grew for awhile then stalled out short of the disk capacity. Something appears to be wrong with this box but I'm at a loss where to look. Other than performance all functionality seems okay with VMs, jails and file sharing services working as expected, just slower.
Any suggestions are welcome.
Code:
155 processes: 1 running, 154 sleeping CPU: 0.4% user, 0.0% nice, 5.0% system, 0.1% interrupt, 94.5% idle Mem: 10G Active, 7178M Inact, 487M Laundry, 16G Wired, 122G Free ARC: 7984M Total, 1648M MFU, 1845M MRU, 52M Anon, 722M Header, 3717M Other 773M Compressed, 2779M Uncompressed, 3.59:1 Ratio Swap: 64G Total, 5458M Used, 59G Free, 8% Inuse, 16K In