Brahma Reddy Battula created HDFS-11864:
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Summary: Document Metrics to track usage of memory for writes
Key: HDFS-11864
URL: https://issues.apache.org/jira/browse/HDFS-11864
Project: Hadoop HDFS
Issue Type: Bug
Components: documentation
Reporter: Brahma Reddy Battula
HDFS-7129 introduced followings metrics which are not documented.
{noformat}
// RamDisk metrics on read/write
@Metric MutableCounterLong ramDiskBlocksWrite;
@Metric MutableCounterLong ramDiskBlocksWriteFallback;
@Metric MutableCounterLong ramDiskBytesWrite;
@Metric MutableCounterLong ramDiskBlocksReadHits;
// RamDisk metrics on eviction
@Metric MutableCounterLong ramDiskBlocksEvicted;
@Metric MutableCounterLong ramDiskBlocksEvictedWithoutRead;
@Metric MutableRate ramDiskBlocksEvictionWindowMs;
final MutableQuantiles[] ramDiskBlocksEvictionWindowMsQuantiles;
// RamDisk metrics on lazy persist
@Metric MutableCounterLong ramDiskBlocksLazyPersisted;
@Metric MutableCounterLong ramDiskBlocksDeletedBeforeLazyPersisted;
@Metric MutableCounterLong ramDiskBytesLazyPersisted;
@Metric MutableRate ramDiskBlocksLazyPersistWindowMs;
final MutableQuantiles[] ramDiskBlocksLazyPersistWindowMsQuantiles;
{noformat}
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