Slow start during modification

Hello

I'm affected by initialization slow environment and trying to figure out if there is a way to do it is faster.

I have an environment unique bdb (5.0.58) about half a terabyte of size, and I can open a process for reading only bdb instantly when there is no other bdb write process.

But when there is another process of writebacks made bdb and cleaning of newspapers, the reading process only bdb seems to expect the the writing process has finished editing the database, which could take hours to finish in my case. Is this expected behavior, or am I missing something?

Attached below are some the unalterable bdb blocked process thread dumps.

-Dump - 1
java.lang.Thread.State: EXECUTABLE
at com.sleepycat.je.cleaner.TrackedFileSummary.trackObsolete(TrackedFileSummary.java:110)
at com.sleepycat.je.cleaner.BaseUtilizationTracker.countObsolete(BaseUtilizationTracker.java:159)
at com.sleepycat.je.cleaner.RecoveryUtilizationTracker.countObsoleteIfUncounted(RecoveryUtilizationTracker.java:114)
at com.sleepycat.je.recovery.RecoveryManager.redoUtilizationInfo(RecoveryManager.java:2519)
at com.sleepycat.je.recovery.RecoveryManager.redoLNs(RecoveryManager.java:1325)
at com.sleepycat.je.recovery.RecoveryManager.buildTree(RecoveryManager.java:602)
at com.sleepycat.je.recovery.RecoveryManager.recover(RecoveryManager.java:198)
at com.sleepycat.je.dbi.EnvironmentImpl.finishInit(EnvironmentImpl.java:610)
-locked (a com.sleepycat.je.dbi.EnvironmentImpl) < 4ed20b72 >
at com.sleepycat.je.dbi.DbEnvPool.getEnvironment(DbEnvPool.java:210)
at com.sleepycat.je.Environment.makeEnvironmentImpl(Environment.java:246)
to com.sleepycat.je.Environment. < init > (Environment.java:227)
to com.sleepycat.je.Environment. < init > (Environment.java:170)


-Dump - 2
java.lang.Thread.State: EXECUTABLE
at java.io.RandomAccessFile.readBytes (Native Method)
at java.io.RandomAccessFile.read(RandomAccessFile.java:355)
at com.sleepycat.je.log.FileManager.readFromFileInternal(FileManager.java:1926)
-locked < 4a5f5b44 > (a $6 com.sleepycat.je.log.FileManager)
at com.sleepycat.je.log.FileManager.readFromFile(FileManager.java:1877)
at com.sleepycat.je.log.FileManager.readFromFile(FileManager.java:1815)
at com.sleepycat.je.log.FileSource.getBytes(FileSource.java:56)
at com.sleepycat.je.log.LogManager.getLogEntryFromLogSource(LogManager.java:882)
at com.sleepycat.je.log.LogManager.getLogEntry(LogManager.java:811)
at com.sleepycat.je.log.LogManager.getLogEntryAllowInvisibleAtRecovery(LogManager.java:772)
at com.sleepycat.je.tree.IN.fetchTarget(IN.java:1412)
at com.sleepycat.je.tree.Tree.searchSubTreeUntilSplit(Tree.java:1786)
at com.sleepycat.je.tree.Tree.searchSubTreeSplitsAllowed(Tree.java:1729)
at com.sleepycat.je.tree.Tree.searchSplitsAllowed(Tree.java:1296)
at com.sleepycat.je.tree.Tree.getParentBINForChildLN(Tree.java:859)
at com.sleepycat.je.recovery.RecoveryManager.redo(RecoveryManager.java:1959)
at com.sleepycat.je.recovery.RecoveryManager.redoOneLN(RecoveryManager.java:1518)
at com.sleepycat.je.recovery.RecoveryManager.redoLNs(RecoveryManager.java:1318)
at com.sleepycat.je.recovery.RecoveryManager.buildTree(RecoveryManager.java:602)
at com.sleepycat.je.recovery.RecoveryManager.recover(RecoveryManager.java:198)
at com.sleepycat.je.dbi.EnvironmentImpl.finishInit(EnvironmentImpl.java:610)
-locked (a com.sleepycat.je.dbi.EnvironmentImpl) < 4ed20b72 >
at com.sleepycat.je.dbi.DbEnvPool.getEnvironment(DbEnvPool.java:210)
at com.sleepycat.je.Environment.makeEnvironmentImpl(Environment.java:246)
to com.sleepycat.je.Environment. < init > (Environment.java:227)
to com.sleepycat.je.Environment. < init > (Environment.java:170)

--

Kind regards
Taka

You make the control points in the process of the writer? If this is not the case, the single reading process will have to replay the journal.

Charles

Tags: Database

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