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Configuration key

Values

Notes

hive.txn.manager 

Default: org.apache.hadoop.hive.ql.lockmgr.DummyTxnManager

Value to turn on transactions: org.apache.hadoop.hive.ql.lockmgr.DbTxnManager

DummyTxnManager replicates pre Hive-0.13 behavior and provides no transactions.

hive.txn.timeout 

Default: 300

Time after which transactions are declared aborted if the client has not sent a heartbeat, in seconds.

hive.txn.max.open.batch

Default: 1000

Maximum number of transactions that can be fetched in one call to open_txns().*

hive.compactor.initiator.on

Default: false

Value to turn on transactions: true (for exactly one instance of the Thrift metastore service)

Whether to run the initiator and cleaner threads on this metastore instance.

hive.compactor.worker.threads

Default: 0

Value to turn on transactions: > 0 on at least one instance of the Thrift metastore service

How many worker threads to run on this metastore instance.**

hive.compactor.worker.timeout

Default: 86400

Time in seconds after which a compaction job will be declared failed and the compaction re-queued.

hive.compactor.check.interval

Default: 300

Time in seconds between checks to see if any partitions need to be compacted.***

hive.compactor.delta.num.threshold

Default: 10

Number of delta directories in a partition that will trigger a minor compaction.

hive.compactor.delta.pct.threshold

Default: 0.1

Fractional size of the deltas relative to the base that will trigger a major compaction. 1 = 100%, so the default 0.1 = 10%.

hive.compactor.abortedtxn.threshold

Default: 1000

Number of aborted transactions on a given partition that will trigger a major compaction.