Monitoring the Store

You can obtain Information about the performance and availability of your store from both server side and client side perspectives:

• Your Oracle NoSQL Database applications can obtain performance statistics using the oracle.kv.KVStore.getStats() class. This provides a client side view of the complete round trip performance for Oracle NoSQL Database operations.

• Oracle NoSQL Database automatically captures Replication Node performance statistics into a log file that you can into into spreadsheet software for analysis. The store tracks, logs, and writes statistics at a user specified interval to a CSV file. The file is je.stat.csv, located in the Environment directory. Logging occurs per-Environment when the Environment is opened in read/write mode.

  Configuration parameters control the size and number of rotating log files to use (similar to java logging, see java.util.logging.FileHandler). For a rotating set of files, as each file reaches a given size limit, it is closed, rotated out, and a new file is opened. Successively older files are named with an incrementing numeric suffix to the file name. The name format is je.stat[version].csv.

• The Oracle NoSQL Database administrative service collects and aggregates status information, alerts, and performance statistics components that the store generates. This provides a detailed view of the behavior and performance of the Oracle NoSQL Database server.

• Each Oracle NoSQL Database Storage Node maintains detailed logs of trace information from the services that the node supports. The administrative service presents an aggregated, store-wide view of these component logs. Logs are available on each Storage Node if the administrative service is not available, or if it is more convenient to examine individual Storage Node logs. Additionally, you can compress these log files to store more logging output in the same disk space.

• Oracle NoSQL Database supports the optional Java Management Extensions (JMX) agents for monitoring. The JMX interfaces allow you to poll the Storage Nodes for information about the storage node and any replication nodes that it hosts. For more information on JMX monitoring, see Standardized Monitoring Interfaces. For information on using JMX securely, see Guidelines for using JMX securely in the Security Guide.

You can monitor the status of the store by verifying it from within the CLI. See Verifying the Store. You can also use the CLI to examine events.