Benoit Lacelle created CASSANDRA-8066: -----------------------------------------
Summary: High Heap Consumption due to high number of SSTableReader Key: CASSANDRA-8066 URL: https://issues.apache.org/jira/browse/CASSANDRA-8066 Project: Cassandra Issue Type: Bug Components: Core Environment: Cassandra 2.1.0 Reporter: Benoit Lacelle Given a workload with quite a lot of reads, I recently encountered high heap memory consumption. Given 2GB of Heap, it appears I have 750.000+ tasks in SSTableReader.syncExecutor, consuming more than 1.2GB. These tasks have type SSTableReader$5, which I guess corresponds to : {code} readMeterSyncFuture = syncExecutor.scheduleAtFixedRate(new Runnable() { public void run() { if (!isCompacted.get()) { meterSyncThrottle.acquire(); SystemKeyspace.persistSSTableReadMeter(desc.ksname, desc.cfname, desc.generation, readMeter); } } }, 1, 5, TimeUnit.MINUTES); {code} I do not have have to the environment right now, but I could provide a threaddump later if necessary. -- This message was sent by Atlassian JIRA (v6.3.4#6332)