RUNTIME_FILTER_MAX_SIZE Query Option (Impala 2.6 or higher only)
RUNTIME_FILTER_MAX_SIZE query option
adjusts the settings for the runtime filtering feature.
This option defines the maximum size for a filter,
no matter what the estimates produced by the planner are.
This value also overrides any lower number specified for the
RUNTIME_BLOOM_FILTER_SIZE query option.
Filter sizes are rounded up to the nearest power of two.
Default: 0 (meaning use the value from the corresponding impalad startup option)
Added in: Impala 2.6.0
Because the runtime filtering feature applies mainly to resource-intensive and long-running queries, only adjust this query option when tuning long-running queries involving some combination of large partitioned tables and joins involving large tables.
This query option affects only Bloom filters, not the min/max filters that are applied to Kudu tables. Therefore, it does not affect the performance of queries against Kudu tables.
Runtime Filtering for Impala Queries (Impala 2.5 or higher only), RUNTIME_FILTER_MODE Query Option (Impala 2.5 or higher only), RUNTIME_FILTER_MIN_SIZE Query Option (Impala 2.6 or higher only), RUNTIME_BLOOM_FILTER_SIZE Query Option (Impala 2.5 or higher only)