Summarize what got stuck when using jstat
When I try to use jstat on remote desktop, I get the following error 1234 is the JVM PID
cmd
>jstat -gcutil 1234 1000
1234 not found
When starting jstat on remote desktop It seems to be useless unless "PsEsec" is used
Download PsEsec from the page above
Store in any folder on the remote desktop
This time, I chose C: \ Program Files \ PSTools.
C:\Program Files\PSTools
Add this to the system environment variable Path of the environment variable
You should now be able to do it.
cmd
C:\Program Files\PSTools>PsEsec64.exe -s jstat -gcutil 1234 1000
I used PsEsec64.exe because the OS of the remote desktop was 64bit.
In case of 32bit, I think you can go with PsEsaec.exe.
I didn't understand the meaning of the header, so I summarized the results of my research.
jstat Excerpt from this
-gcutil option Summary of garbage collection statistics
S0: Survivor area 0 utilization (percentage to current capacity).
S1: Survivor area 1 utilization (percentage to current capacity).
E: Eden space utilization (percentage to current capacity).
O: Old space utilization (percentage to current capacity).
M: Metaspace usage (percentage to current capacity).
CCS: Compressed class area utilization (percentage).
YGC: The number of GC events for the Young generation.
YGCT: Young generation garbage collection time.
FGC: Number of full GC events.
FGCT: Full garbage collection time.
GCT: Total time for garbage collection.
S0 is Surviver From S1 is Surviver's To You can see the transition of usage rate from From to To
O is Old usage The usage rate will gradually increase
M is native memory A place that was formerly known as the heap area Up to 16 exabytes can be secured
If you know these four, you can understand the resource status.