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Configuration key | Values | Location | Notes |
Default: org.apache.hadoop.hive.ql.lockmgr.DummyTxnManager Value required for transactions: org.apache.hadoop.hive.ql.lockmgr.DbTxnManager | Client/ | DummyTxnManager replicates pre Hive-0.13 behavior and provides no transactions. | |
Default: 300 | Client/ HiveServer2 | Time after which transactions are declared aborted if the client has not sent a heartbeat, in seconds. | |
hive.timedout.txn.reaper.start | Default: 100s | Metastore | Time delay of first reaper (the process which aborts timed-out transactions) run after the metastore starts (as of Hive 1.3.0). |
Default: 180s | Metastore | Time interval describing how often the reaper (the process to abort which aborts timed-out transactions) runs (as of Hive 1.3.0). | |
Default: 1000 | Client | Maximum number of transactions that can be fetched in one call to open_txns().* | |
Default: false Value required for transactions: true (for exactly one instance of the Thrift metastore service) | Metastore | Whether to run the initiator and cleaner threads on this metastore instance. It's critical that this is enabled on exactly one metastore service instance . (Not not enforced yet).
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Default: 0 Value required for transactions: > 0 on at least one instance of the Thrift metastore service | Metastore | How many compactor worker threads to run on this metastore instance.** | |
Default: 86400 | Metastore | Time in seconds after which a compaction job will be declared failed and the compaction re-queued. | |
hive.compactor.cleaner.run.interval | Default: 5000 | Metastore | Time in milliseconds between runs of the cleaner thread. (Hive 0.14.0 and later.) |
Default: 300 | Metastore | Time in seconds between checks to see if any tables or partitions need to be compacted.*** | |
Default: 10 | Metastore | Number of delta directories in a table or partition that will trigger a minor compaction. | |
Default: 0.1 | Metastore | Percentage (fractional) size of the delta files relative to the base that will trigger a major compaction. 1 = 100%, so the default 0.1 = 10%. | |
Default: 1000 | Metastore | Number of aborted transactions involving a given table or partition that will trigger a major compaction. |
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