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java.lang.Objectcom.sleepycat.je.cleaner.BaseUtilizationTracker
public abstract class BaseUtilizationTracker
Shared implementation for all utilization trackers. The base implementation keeps track of per-file utilization info only. Subclasses keep track of per-database info.
Method Summary | |
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void |
countObsoleteDb(DbFileSummaryMap dbFileSummaries,
long mapLnLsn)
Counts all active LSNs in a database as obsolete in the per-file utilization summaries. |
EnvironmentImpl |
getEnvironment()
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TrackedFileSummary |
getTrackedFile(long fileNum)
Returns one file from the snapshot of tracked files, or null if the given file number is not in the snapshot array. |
java.util.Collection<TrackedFileSummary> |
getTrackedFiles()
Returns a snapshot of the files being tracked as of the last time a log entry was added. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public EnvironmentImpl getEnvironment()
public java.util.Collection<TrackedFileSummary> getTrackedFiles()
If files are added or removed from the collection of tracked files in real time, the returned collection will not be changed since it is a snapshot. But the objects contained in the collection are live and will be updated in real time under the log write latch. The collection and the objects in the collection should not be modified by the caller.
public TrackedFileSummary getTrackedFile(long fileNum)
getTrackedFiles()
public void countObsoleteDb(DbFileSummaryMap dbFileSummaries, long mapLnLsn)
For the global tracker, must be called under the log write latch.
dbFileSummaries
- the map of Long file number to DbFileSummary for
a database that is being deleted.mapLnLsn
- is the LSN of the MapLN when recovery is replaying the
truncate/remove, or NULL_LSN when called outside of recovery; obsolete
totals should only be counted when this LSN is prior to the LSN of the
FileSummaryLN for the file being counted.
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