Linux cpu monitoring6/2/2023 My server has an Intel Xeon X3460 4-cores/8-threads (Lynnfield, Nehalem) with 24 GB of DDR3 RAM. Using latest pkg branch and openjdk19 instead of openjdk17-jre doesn't appear to affect it either. When no Java processes are running, then CPU is back to 98% or more in C3.ĭisabling ASLR does not seem to affect this. Interestingly, top shows total CPU idle at 99% but there were 3 Java processes all using 30% each, so I would expect idle to be closer to 87% or so. For instance, a program that’s waiting on a network request, or disk I/O, wouldn’t count toward CPU load on Unix. This seems to be affecting Minecraft servers more than other Java applications, but my UniFi Controller (uses Java) also seems more power hungry now.īefore on 13.1-RELEASE, each Minecraft server Java process at idle used around 1.5% WCPU and C-States were 98% or more in C3, now after the update, each Minecraft server Java process uses around 30% WCPU and C-States are less than 10% in C3. Linux measures CPU load by looking both at programs that are currently using or waiting for CPU time in addition to programs that are in waiting states. After upgrading my server and jails to 13.2-RELEASE, I have noticed increased CPU utilization by Java processes in top as well as running in more power-hungry C-States much more often as reported by sysctl.
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