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The interface_stats_* tables store statistical metrics about communications over each active interface for a Greenplum Database instance.
These tables are in place for future use and are not currently populated.
There are three interface_stats tables, all having the same columns:
- interface_stats_now is an external table whose data files are stored in $MASTER_DATA_DIRECTORY/gpperfmon/data.
- interface_stats_tail is an external table whose data files are stored in $MASTER_DATA_DIRECTORY/gpperfmon/data. This is a transitional table for statistical interface metrics that has been cleared from interface_stats_now but has not yet been committed to interface_stats_history. It typically only contains a few minutes worth of data.
- interface_stats_history is a regular table that stores statistical interface metrics. It is pre-partitioned into monthly partitions. Partitions are automatically added in one month increments as needed.
|interface_name||string||Name of the interface. For example: eth0, eth1, lo.|
|bytes_received||bigint||Amount of data received in bytes.|
|packets_received||bigint||Number of packets received.|
|receive_errors||bigint||Number of errors encountered while data was being received.|
|receive_drops||bigint||Number of times packets were dropped while data was being received.|
|receive_fifo_errors||bigint||Number of times FIFO (first in first out) errors were encountered while data was being received.|
|receive_frame_errors||bigint||Number of frame errors while data was being received.|
|receive_compressed_packets||int||Number of packets received in compressed format.|
|receive_multicast_packets||int||Number of multicast packets received.|
|bytes_transmitted||bigint||Amount of data transmitted in bytes.|
|packets_transmitted||bigint||Amount of data transmitted in bytes.|
|packets_transmitted||bigint||Number of packets transmitted.|
|transmit_errors||bigint||Number of errors encountered during data transmission.|
|transmit_drops||bigint||Number of times packets were dropped during data transmission.|
|transmit_fifo_errors||bigint||Number of times fifo errors were encountered during data transmission.|
|transmit_collision_errors||bigint||Number of times collision errors were encountered during data transmission.|
|transmit_carrier_errors||bigint||Number of times carrier errors were encountered during data transmission.|
|transmit_compressed_packets||int||Number of packets transmitted in compressed format.|