gc duration ; collections /; total /; memory>/; all-pools – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” gc duration ; collections /; total /; memory>/; all-pools ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: memory and monitor.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “[gc][{}][{}][{}] duration [{}]; collections [{}]/[{}]; total [{}]/[{}]; memory [{}]->[{}]/[{}]; all_pools {}” classname is JvmMonitorService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 
                if (avgCollectionTime > gcThreshold.warnThreshold) {
                    logger.warn("[gc][{}][{}][{}] duration [{}]; collections [{}]/[{}]; total [{}]/[{}]; memory [{}]->[{}]/[{}]; all_pools {}";
                            gc.getName(); seq; gc.getCollectionCount(); TimeValue.timeValueMillis(collectionTime); collections; TimeValue.timeValueMillis(currentJvmStats.getTimestamp() - lastJvmStats.getTimestamp()); TimeValue.timeValueMillis(collectionTime); gc.getCollectionTime(); lastJvmStats.getMem().getHeapUsed(); currentJvmStats.getMem().getHeapUsed(); JvmInfo.jvmInfo().getMem().getHeapMax(); buildPools(lastJvmStats; currentJvmStats));
                } else if (avgCollectionTime > gcThreshold.infoThreshold) {
                    logger.info("[gc][{}][{}][{}] duration [{}]; collections [{}]/[{}]; total [{}]/[{}]; memory [{}]->[{}]/[{}]; all_pools {}";
                            gc.getName(); seq; gc.getCollectionCount(); TimeValue.timeValueMillis(collectionTime); collections; TimeValue.timeValueMillis(currentJvmStats.getTimestamp() - lastJvmStats.getTimestamp()); TimeValue.timeValueMillis(collectionTime); gc.getCollectionTime(); lastJvmStats.getMem().getHeapUsed(); currentJvmStats.getMem().getHeapUsed(); JvmInfo.jvmInfo().getMem().getHeapMax(); buildPools(lastJvmStats; currentJvmStats));
                } else if (avgCollectionTime > gcThreshold.debugThreshold && logger.isDebugEnabled()) {
                    logger.debug("[gc][{}][{}][{}] duration [{}]; collections [{}]/[{}]; total [{}]/[{}]; memory [{}]->[{}]/[{}]; all_pools {}";
                            gc.getName(); seq; gc.getCollectionCount(); TimeValue.timeValueMillis(collectionTime); collections; TimeValue.timeValueMillis(currentJvmStats.getTimestamp() - lastJvmStats.getTimestamp()); TimeValue.timeValueMillis(collectionTime); gc.getCollectionTime(); lastJvmStats.getMem().getHeapUsed(); currentJvmStats.getMem().getHeapUsed(); JvmInfo.jvmInfo().getMem().getHeapMax(); buildPools(lastJvmStats; currentJvmStats));
                }




 

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