Hello misc@, On OpenBSD 5.2 amd64, I'm storing 1.4GB of source code files and about 8x 150MB indices on an mfs partition, plus a gig or two of other automatically-generated files.
If I run mount_mfs to load all this stuff from a regular drive, then the amount of memory used by mount_mfs(8) is about the same as the amount of Used disc space as reported by df(1). However, if I re-run index generation on an mfs, then after it's all done, memory usage by mount_mfs(8) noticeably exceeds Used disc space. As a workaround, I found that it's possible to copy all the files over to a new mount_mfs(8) process, after the indices have been re-generated, and the new process will at first have a much better memory usage, but this seems a little inconvenient and would also require a temporary burst of extra RAM to accomplish. Should I worry that on a 6GB partition that is only 4GB full, mount_mfs uses 5GB of memory after about 3GB of data gets mingled? Is mount_mfs swappable? If I end up being short on memory, would that extra 1GB from mount_mfs(8) be swapped out without affecting the performance? Or is there a way to run some kind of garbage collector or otherwise improve on an mfs memory use? % df -hi | fgrep -e Used -e mfs ; mount | fgrep mfs ; ps aux | fgrep -e USER -e mfs Filesystem Size Used Avail Capacity iused ifree %iused Mounted on mfs:18610 5.9G 4.1G 1.5G 73% 439864 357702 55% /grok/mfs mfs:18610 on /grok/mfs type mfs (asynchronous, local, nodev, nosuid, size=12582912 512-blocks) USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME COMMAND root 18610 0.0 40.2 6291936 5048352 ?? Is Sun07PM 0:22.56 /sbin/mount_mfs -o rw -s6G -f2048 Cheers, Constantine.
