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This controls how many transactions streaming agents such as Flume or Storm open simultaneously. The streaming agent then writes that number of entries into a single file (per Flume agent or Storm bolt). Thus increasing this value decreases the number of delta files created by streaming agents. But it also increases the number of open transactions that Hive has to track at any given time, which may negatively affect read performance.

hive.txn.max.open.txns

• Default Value: 100000
• Added In: Hive 1.3.0 and 2.1.0 with HIVE-13249

Maximum number of open transactions. If current open transactions reach this limit, future open transaction requests will be rejected, until this number goes below the limit.

hive.count.open.txns.interval

• Default Value: 1s
• Added In: Hive 1.3.0 and 2.1.0 with HIVE-13249

Time in seconds between checks to count open transactions.

hive.txn.retryable.sqlex.regex

• Default Value: (empty)
• Added In: Hive 1.3.0 and 2.1.0 with HIVE-12637

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