Use the FETCH_ROWS_TIMEOUT_MS query option to control: how long Impala waits for query results when clients fetch rows. WitrynaFETCH_ROWS_TIMEOUT_MS Query Option Use the FETCH_ROWS_TIMEOUT_MS query option to control how long Impala waits for query results when clients fetch …
FETCH_ROWS_TIMEOUT_MS Query Option - The Apache Software …
WitrynaThe --backend_client_rpc_timeout_ms option can be used to specify the number of milliseconds Impala should wait for a response from the backend client before it terminates the connection and signals a failure. The default value for this property is 300000 milliseconds, or 5 minutes. Cancelling a Query WitrynaBUFFER_POOL_LIMIT Query Option. Defines a limit on the amount of memory that a query can allocate from the internal buffer pool. The value for this limit applies to the memory on each host, not the aggregate memory across the cluster. Typically not changed by users, except during diagnosis of out-of-memory errors during queries. … crypto client download
impala/impala_query_results_spooling.xml at master · apache/impala
Witryna9 mar 2024 · Since this issue impacts various drivers, it is best to change the default value of FETCH_ROWS_TIMEOUT_MS to 0 to revert to the blocking behavior. Users … WitrynaAPPX_COUNT_DISTINCT Query Option ( Impala 2.0 or higher only) When the APPX_COUNT_DISTINCT query option is set to TRUE, Impala implicitly converts COUNT (DISTINCT) operations to the NDV () function calls. The resulting count is approximate rather than precise. WitrynaTo prevent clients from indefinitely waiting for query results, use the FETCH_ROWS_TIMEOUT_MS query option to set the timeout when clients fetch rows. Timeout applies both when query result spooling is enabled and disabled: When result spooling is disabled (SPOOL_QUERY_RESULTS = FALSE), the timeout controls … duree action zopiclone