jqinstalledaws-cliinstalled
The script uses jstat to collect information about the jvm heap.
| Short Name | Name |
|---|---|
| S0C | CURRENT SURVIVOR SPACE 0 CAPACITY (KB). |
| S1C | CURRENT SURVIVOR SPACE 1 CAPACITY (KB). |
| S0U | SURVIVOR SPACE 0 UTILIZATION (KB). |
| S1U | SURVIVOR SPACE 1 UTILIZATION (KB). |
| EC | CURRENT EDEN SPACE CAPACITY (KB). |
| EU | EDEN SPACE UTILIZATION (KB). |
| OC | CURRENT OLD SPACE CAPACITY (KB). |
| OU | OLD SPACE UTILIZATION (KB). |
| PC | CURRENT PERMANENT SPACE CAPACITY (KB). |
| PU | PERMANENT SPACE UTILIZATION (KB). |
| YGC | NUMBER OF YOUNG GENERATION GC EVENTS. |
| YGCT | YOUNG GENERATION GARBAGE COLLECTION TIME. |
| FGC | NUMBER OF FULL GC EVENTS. |
| FGCT | FULL GARBAGE COLLECTION TIME. |
| GCT | TOTAL GARBAGE COLLECTION TIME. |
jvm-mon.sh --stats stat0[, statN]For the statistics, you can add any of the above mentioned short names to publish it. E.g.:
# publish capacity and utilization for both survivor spaces
jvm-mon.sh --stats s0c,s1c,s0u,s1uIn addition, you can use the following for aggregated statistics:
| Parameter | Description |
|---|---|
| capacity | Sum of all capacities of survivor, eden and old psace (S0C+S1C+EC+OC) |
| util | Sum of all utilizations of survivor, eden and old space (S0U+S1U+EU+OU) |
packages:
yum:
jq: []
sources:
/opt/cloudwatch: https://github.com/0ptional/aws-ec2-jvm-monitoring/releases/download/1.0/CloudWatchJVMMonitoringScripts-1.0.zip
container_commands:
01-setupcron:
command: |
echo '*/1 * * * * root /opt/cloudwatch/aws-scripts-jvm-mon/jvm-mon.sh --stats s0u,s1u,eu,ou >> /var/log/cw_jvm_mon' > /etc/cron.d/cw_jvm_mon
02-changeperm:
command: chmod u+x /opt/cloudwatch/aws-scripts-jvm-mon/jvm-mon.sh