On Sat, Nov 30, 2013 at 04:02:58PM -0500, John Hynes wrote: > I'm having some trouble figuring out what is causing a systemic performance > issue. By "systemic" I mean that running even seemingly trivial things > (i.e. 'ls' on a directory with only a few files in it) is accompanied by a > substantial delay before any response, say, of 15-30 seconds. Not *every* > single time, but pretty frequently. Looking at top, load average is higher > than expected on a largely idle web & smtp server, usually between .7 and > 1.6. This is a dual-core opteron box (Sun Fire X2100) with 8GB RAM. (dmesg > below). > > Sorting top by CPU utilization shows that the CPUs are mostly idle. > vmstat/iostat isn't making anything leap out at me as getting stuck in > paging or waiting for I/O. The disc is a softraid RAID1 volume, bioctl > shows that it's OK. This does not appear to be network bandwidth-related, > at least, I can get the expected throughput testing with iperf. > > Posting something on the forum software that it's running can take 3-4 > minutes to complete, and it's writing the posted info to a mysql database. > Neither httpd nor mysqld seem to wind up much load while this is occurring. > > So, what should I be looking at to figure out where things are getting > stalled up? > > Thanks for any ideas, > > -John > > dmesg: > > OpenBSD 5.3 (GENERIC.MP) #0: Fri Sep 13 04:11:52 EDT 2013 > j...@hytronix-gw1.hytronix.com:/usr/src/sys/arch/amd64/compile/ > GENERIC.MP
Try 5.4 or -current. Issues with non-home-compiled kernels are more interesting. .... Ken
