| -- Capture current interconnect stats as baseline for future comparisons |
| SELECT * FROM gp_interconnect_stats \gset prev_ |
| -- Verify that all baseline interconnect statistics are >= 0 (no negative values) |
| SELECT |
| :prev_total_recv_queue_size >= 0, |
| :prev_recv_queue_conting_time >= 0, |
| :prev_total_capacity >= 0, |
| :prev_capacity_counting_time >= 0, |
| :prev_total_buffers >= 0, |
| :prev_buffer_counting_time >= 0, |
| :prev_retransmits >= 0, |
| :prev_startup_cached_pkts >= 0, |
| :prev_mismatches >= 0, |
| :prev_crs_errors >= 0, |
| :prev_snd_pkt_num >= 0, |
| :prev_recv_pkt_num >= 0, |
| :prev_disordered_pkt_num >= 0, |
| :prev_duplicate_pkt_num >= 0, |
| :prev_recv_ack_num >= 0, |
| :prev_status_query_msg_num >= 0; |
| ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? |
| ----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+---------- |
| t | t | t | t | t | t | t | t | t | t | t | t | t | t | t | t |
| (1 row) |
| |
| -- Create test table to generate interconnect traffic |
| CREATE TABLE test_ic_data |
| AS SELECT generate_series(1, 1000) AS id |
| DISTRIBUTED RANDOMLY; |
| -- Re-capture current state: overwrite prev with latest values |
| SELECT * FROM gp_interconnect_stats \gset prev2_ |
| -- Check if current statistics are >= baseline values after first data insertion |
| SELECT |
| :prev2_total_recv_queue_size >= :prev_total_recv_queue_size, |
| :prev2_recv_queue_conting_time >= :prev_recv_queue_conting_time, |
| :prev2_total_capacity >= :prev_total_capacity, |
| :prev2_capacity_counting_time >= :prev_capacity_counting_time, |
| :prev2_total_buffers >= :prev_total_buffers, |
| :prev2_buffer_counting_time >= :prev_buffer_counting_time, |
| :prev2_retransmits >= :prev_retransmits, |
| :prev2_startup_cached_pkts >= :prev_startup_cached_pkts, |
| :prev2_mismatches >= :prev_mismatches, |
| :prev2_crs_errors >= :prev_crs_errors, |
| :prev2_snd_pkt_num >= :prev_snd_pkt_num, |
| :prev2_recv_pkt_num >= :prev_recv_pkt_num, |
| :prev2_disordered_pkt_num >= :prev_disordered_pkt_num, |
| :prev2_duplicate_pkt_num >= :prev_duplicate_pkt_num, |
| :prev2_recv_ack_num >= :prev_recv_ack_num, |
| :prev2_status_query_msg_num >= :prev_status_query_msg_num; |
| ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? |
| ----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+---------- |
| t | t | t | t | t | t | t | t | t | t | t | t | t | t | t | t |
| (1 row) |
| |
| -- Insert additional data to further test interconnect statistics changes under load |
| INSERT INTO test_ic_data SELECT generate_series(1001, 2000); |
| -- Re‑check if current statistics remain >= baseline after second data insertion |
| SELECT |
| total_recv_queue_size >= :prev2_total_recv_queue_size, |
| recv_queue_conting_time >= :prev2_recv_queue_conting_time, |
| total_capacity >= :prev2_total_capacity, |
| capacity_counting_time >= :prev2_capacity_counting_time, |
| total_buffers >= :prev2_total_buffers, |
| buffer_counting_time >= :prev2_buffer_counting_time, |
| retransmits >= :prev2_retransmits, |
| startup_cached_pkts >= :prev2_startup_cached_pkts, |
| mismatches >= :prev2_mismatches, |
| crs_errors >= :prev2_crs_errors, |
| snd_pkt_num >= :prev2_snd_pkt_num, |
| recv_pkt_num >= :prev2_recv_pkt_num, |
| disordered_pkt_num >= :prev2_disordered_pkt_num, |
| duplicate_pkt_num >= :prev2_duplicate_pkt_num, |
| recv_ack_num >= :prev2_recv_ack_num, |
| status_query_msg_num >= :prev2_status_query_msg_num |
| FROM gp_interconnect_stats; |
| ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? | ?column? |
| ----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+---------- |
| t | t | t | t | t | t | t | t | t | t | t | t | t | t | t | t |
| (1 row) |
| |
| DROP TABLE test_ic_data; |
| DROP EXTENSION interconnect; |