Summary of the Replication Server Database Environment Monitor information
The following table provides a description of the attributes in the cn=Replication Server Database Environment
monitor entry, which includes the environment variables associated with the Oracle Berkeley Database Java Edition backend.
The following is the distinguished name (DN) for the Replica Server Database Monitor entry.
dn: cn=Replication Server Database Environment,cn=monitor
Monitor Attribute | Description |
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Current version of the Oracle Berkeley Java Edition. |
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Current database (DB) cache size. |
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Maximum DB cache size. |
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Percentage of the cache used by the server. |
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Directory that holds the changelogDb file. |
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Size of the DB on disk. |
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Number of log files that must be cleaned for the cleaner to meet its target utilization. |
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Number of disk reads which required repositioning the disk head more than 1MB from the previous file position. |
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Number of disk writes which required repositioning the disk head by more than 1MB from the previous file position. |
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Number of disk reads which did not require repositioning the disk head more than 1MB from the previous file position. |
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Number of disk writes which did not require repositioning the disk head by more than 1MB from the previous file position. |
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Accumulated number of nodes evicted. |
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Number of currently active transactions. |
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Number of checkpoints. A checkpoint is a process that writes to your log files all the internal BTree nodes and structures modified as a part of write operations to your log files to facilitate a quick recovery. |
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Indicates if a checkpoint is in progress. |
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Total time in milliseconds for all checkpoints. |
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Average time in milliseconds for all checkpoints. |
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Duration in milliseconds of the last checkpoint run. |
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Start time of the last checkpoint. |
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Stop time of the last checkpoint. |
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Time in milliseconds since the last checkpoint. |
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Total read locks currently held. |
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Total write locks currently held. |
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Total transactions waiting for locks. |
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Number of bytes of JE cache used for log cleaning metadata and other administrative structure. |
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Total memory currently consumed by log buffers, in bytes. |
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Total memory of cache used for data. |
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Total amount of JE cache in use, in bytes. |
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Number of files to be cleaned to reach the target utilization. |
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Number of bottom internal nodes (BINs) encountered by the INCompressor that had cursors referring to them when the compressor ran. The compressor thread cleans up the internal BTree as records are deleted to ensure unused nodes are not present. |
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Amount of JE cache used for holding data, keys and internal Btree nodes, in bytes. |
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Number of bins encountered by the INCompressor that had their database closed between the time they were put on the compressor queue and when the compressor ran. |
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Location of the next entry to be written to the log. |
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Number of entries in the INCompressor queue when the |
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Location in the log of the last checkpoint end. |
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ID of the last checkpoint. |
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Location in the log of the last checkpoint start. |
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Number of bytes of Java Edition (JE) cache used for holding locks and transactions. |
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Number of BINS stripped by the evictor. |
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Total number of requests for database objects that were not in memory. |
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Total number of checkpoints run so far. |
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Number of cleaner file deletions this session. |
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Accumulated number of log entries read by the cleaner. |
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Number of cleaner runs this session. |
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Accumulated number of leaf nodes (LNs) processed because they qualify for clustering. |
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Accumulated number of delta internal nodes (INs) flushed to the log. |
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Number of passes made to the evictor. |
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Number of fsyncs requested through the group commit manager. |
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Number of fsync requests submitted to the group commit manager which timed out. |
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Number of fsyncs issued through the group commit manager. |
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Number of times a log file has been opened. |
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Accumulated number of full BINs flushed to the log. |
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Accumulated number of full INs flushed to the log. |
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Accumulated number of INs cleaned. |
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Accumulated number of INs that were not found in the tree anymore (deleted). |
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Accumulated number of INs migrated. |
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Accumulated number of INs obsolete. |
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Accumulated number of LNs processed without a tree lookup. |
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Accumulated number of LNs cleaned. |
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Accumulated number of LNs that were not found in the tree anymore (deleted). |
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Accumulated number of LNs encountered that were locked. |
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Accumulated number of LNs that were marked for migration during cleaning. |
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Accumulated number of LNs migrated. |
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Accumulated number of LNs obsolete. |
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Number of log buffers currently instantiated. |
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Accumulated number of LNs processed because they were previously marked for migration. |
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Accumulated number of nodes evicted. |
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Accumulated number of nodes scanned to select the eviction set. |
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Accumulated number of nodes selected to evict. |
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Number of requests for database objects not contained within the in memory data structures. |
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Number of files currently open in the file cache. |
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Accumulated number of pending LNs that could not be locked for migration because of a long duration application lock. |
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Accumulated number of LNs processed because they were previously locked. |
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Number of bytes read which required repositioning the disk head more than 1MB from the previous file position. |
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Number of disk reads which required repositioning the disk head more than 1MB from the previous file position. |
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Number of bytes written which required repositioning the disk head more than 1MB from the previous file position. |
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Number of disk writes which required repositioning the disk head by more than 1MB from the previous file position. |
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Number of reads that had to be repeated when faulting in an object from disk because the read chunk size controlled by |
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Number of times we try to read a log entry larger than the read buffer size and can’t grow the log buffer to accommodate the large object. |
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Accumulated number of database root nodes evicted. |
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Number of bytes read which did not require repositioning the disk head more than 1MB from the previous file position. |
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Number of disk reads which did not require repositioning the disk head more than 1MB from the previous file position. |
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Number of bytes written which did not require repositioning the disk head more than 1MB from the previous file position. |
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Number of disk writes which did not require repositioning the disk head by more than 1MB from the previous file position. |
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Number of environments using the shared cache. |
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Number of writes which had to be completed using the temporary marshalling buffer because the fixed size log buffers specified by |
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Accumulated number of LNs processed because they are soon to be cleaned. |
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Number of non-empty bins. |
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Number of bins that were successfully processed by the INCompressor. |
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Number of bytes that must be evicted to get within the memory budget. |
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Total amount of the shared JE cache in use in bytes. |
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Number of bins encountered by the INCompressor that were split between the time they were put on the compressor queue and when the compressor ran. |
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Approximation of the current total log size in bytes. |
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Total lock owners in the lock table. |
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Total read locks currently held. |
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Total number of lock requests to date. |
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Total locks currently in the lock table. |
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Total transactions waiting for locks. |
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Total number of lock waits to date. |
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Total write locks currently held. |
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Time of the last checkpoint. |
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Last transaction ID allocated. |
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Number of transactions that have aborted. |
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Number of transactions that are currently active. |
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Number of transactions that have begun. |
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Number of transactions that have committed. |
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Number of XA transactions that have aborted. |
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Number of XA transactions that have committed. |
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Number of XA transactions that have been prepared. |