<![CDATA[MangoGT running out of memory?]]>Catching a few MangoGT units hanging, to find Out Of Memory errors in the logs:

Dec 06 01:00:43 mangoGT5176 start-mango.sh[529]: Exception in thread "high-pool-2-thread-5894" com.infiniteautomation.tsdb.IasTsdbException: java.io.IOException: Map failed
Dec 06 01:00:43 mangoGT5176 start-mango.sh[529]:         at com.infiniteautomation.tsdb.impl.IasTsdbImpl.count(IasTsdbImpl.java:1124)
Dec 06 01:00:43 mangoGT5176 start-mango.sh[529]:         at com.infiniteautomation.nosql.InternalGenericDao.rangeCount(InternalGenericDao.java:393)
Dec 06 01:00:43 mangoGT5176 start-mango.sh[529]:         at 
[snipped]
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.serotonin.m2m2.persistent.pub.SyncHandler$PointSync.checkRangeImpl(SyncHandler.java:514)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.serotonin.m2m2.persistent.pub.SyncHandler$PointSync.checkRange(SyncHandler.java:345)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.serotonin.m2m2.persistent.pub.SyncHandler$PointSync.checkPoint(SyncHandler.java:326)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.serotonin.m2m2.persistent.pub.SyncHandler$PointSync.run(SyncHandler.java:276)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.serotonin.timer.sync.Synchronizer$TaskWrapper.run(Synchronizer.java:150)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.serotonin.timer.Task.runTask(Task.java:179)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.serotonin.timer.TaskWrapper.run(TaskWrapper.java:23)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at java.base/java.lang.Thread.run(Thread.java:830)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]: Caused by: java.io.IOException: Map failed
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at java.base/sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:1017)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.infiniteautomation.tsdb.impl.ChecksumMappedByteBufferInputStream.<init>(ChecksumMappedByteBufferInputStream.java:41)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.infiniteautomation.tsdb.impl.ReversibleShard.openDataIn(ReversibleShard.java:250)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.infiniteautomation.tsdb.impl.Shard.query(Shard.java:473)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.infiniteautomation.tsdb.impl.CompressibleShard.query(CompressibleShard.java:391)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.infiniteautomation.tsdb.impl.Series.query(Series.java:532)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at com.infiniteautomation.tsdb.impl.IasTsdbImpl.count(IasTsdbImpl.java:1095)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         ... 48 more
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]: Caused by: java.lang.OutOfMemoryError: Map failed
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at java.base/sun.nio.ch.FileChannelImpl.map0(Native Method)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         at java.base/sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:1014)
Dec 06 01:02:22 mangoGT5176 start-mango.sh[529]:         ... 54 more

Suggestions? Adjust thread pools? Swap?

]]>https://forum.mango-os.com/topic/5016/mangogt-running-out-of-memoryRSS for NodeWed, 20 May 2026 04:45:19 GMTTue, 08 Dec 2020 03:24:34 GMT60<![CDATA[Reply to MangoGT running out of memory? on Fri, 19 Feb 2021 21:32:13 GMT]]>Either get more memory or try this env property:

#Set the number of files the database can have open at one time
db.nosql.maxOpenFiles=500

It will close/unmap files at the expense of cpu use. If this problem persists then try another stream type:

#Query Performance Tuning, File Access Type:Available[INPUT_STREAM,FILE_CHANNEL,RANDOM_ACCESS_FILE,MAPPED_BYTE_BUFFER]

db.nosql.shardStreamType=MAPPED_BYTE_BUFFER
]]>https://forum.mango-os.com/post/26332https://forum.mango-os.com/post/26332Fri, 19 Feb 2021 21:32:13 GMT<![CDATA[Reply to MangoGT running out of memory? on Wed, 17 Feb 2021 21:28:31 GMT]]>Was this ever fixed?

]]>https://forum.mango-os.com/post/26324https://forum.mango-os.com/post/26324Wed, 17 Feb 2021 21:28:31 GMT