How to Enable Garbage Collection (GC) Logging

お困りですか?

アトラシアン コミュニティをご利用ください。

コミュニティに質問

本ナレッジベースはアトラシアンの サーバー プラットフォーム向けに記載されたものです。Atlassian Cloud との機能の違いにより、本記事の内容を Atlassian Cloud アプリケーションに適用することはできません。

目的

Garbage collection logs are useful when trying to isolate issues within Java-based applications as they will pinpoint blocked, hung or stuck threads that may be causing downstream effects in the application. It is always useful to collect at least 10 minutes of garbage collection logs, but analysis accuracy is often increased by the amount of recent log data to review.

ソリューション

Linux の場合

Add the following parameters into your Confluence System Properties, in the <confluence-install>/bin/setenv.sh file (be sure to enter the path for your <confluence-home> directory)

-Xloggc:<confluence-home>/logs/`date +%F_%H-%M-%S`-gc.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintTenuringDistribution -XX:+PrintGCCause
-XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=5M

The parameter -XX:+PrintGCCause was introduced within Java 1.7.0_45 and will not work if you are using a version of Java prior to that version. Please check the version of Java that is being used by your instance of Confluence prior to using this flag.

Windows :

Batch file

If you start Confluence using 'start-confluence.bat', add the below code to setenv.bat

rem Create a timestamp with date and time, replacing ' ' with '0' and '/' with '-'
set atlassian_timestamp=%DATE:~-4%.%DATE:~4,2%.%DATE:~7,2%_%TIME:~0,2%.%TIME:~3,2%.%TIME:~6,2%
set atlassian_timestamp=%atlassian_timestamp: =0%
set atlassian_timestamp=%atlassian_timestamp:/=-%
set atlassian_logsdir=%~dp0..\logs

set CATALINA_OPTS=%CATALINA_OPTS% -Xloggc:"%atlassian_logsdir%\gc-%atlassian_timestamp%.log"
set CATALINA_OPTS=%CATALINA_OPTS% -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=5M -XX:+PrintGCCause
set CATALINA_OPTS=%CATALINA_OPTS% -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintTenuringDistribution 

NB: This will create the garbage collection logs in the <confluence-install> directory.

Service

If you start Windows as a service, add the below to the service by following these steps (be sure to enter the path for your <confluence-home> directory)

-Xloggc:<confluence-home>\logs\gc-%t.log
-XX:+PrintGCDetails
-XX:+PrintGCDateStamps
-XX:+PrintGCCause
-XX:+PrintTenuringDistribution
-XX:+UseGCLogFileRotation
-XX:NumberOfGCLogFiles=10
-XX:GCLogFileSize=5M
説明

Garbage collection logs are useful when trying to isolate issues within Java-based applications as they will pinpoint blocked, hung or stuck threads that may be causing downstream effects in the application. It is always useful to collect at least 10 minutes of garbage collection logs, but analysis accuracy is often increased by the amount of recent log data to review.

製品 Confluence, Bitbucket, Jira, Bamboo
最終更新日: 2018 年 9 月 12 日

この内容はお役に立ちましたか?

はい
いいえ
この記事についてのフィードバックを送信する
Powered by Confluence and Scroll Viewport.