query performance slow on 3 node cluster

Comments

• ashu123

  March 2018

  db_testing_0=> select count(*) from cluster;
    count   
  ----------
   20000011
  (1 row)
  
  Time: First fetch (1 row): 541.088 ms. All rows formatted: 541.117 ms
  db_testing_0=> select count(*) from cluster where cy=5;
   count 
  -------
   66801
  (1 row)
  
  Time: First fetch (1 row): 16364.492 ms. All rows formatted: 16364.523 ms
  

  why 3 node cluster taking this much of time , Please help I'm stuck

  0
• ashu123

  March 2018

  created projection on the same table, and the result is like this

  db_testing_0=> select count(*) from cluster_p_b0 where cy=5;
   count 
  -------
   66801
  (1 row)
  
  Time: First fetch (1 row): 34703.515 ms. All rows formatted: 34703.539 ms
  

  0
• Jim_Knicely - Select Field - Administrator

  March 2018 edited March 2018

  Verify the current k-safety of your DB:

  select node_count, node_down_count, current_fault_tolerance from system;

  Verify the table projections are up to date:

  select projection_name, node_name, verified_fault_tolerance, is_up_to_date, is_segmented from projections where anchor_table_name = 'cluster';

  0
• ashu123

  March 2018

  user_testing=> select node_count, node_down_count, current_fault_tolerance from system;
   node_count | node_down_count | current_fault_tolerance 
  ------------+-----------------+-------------------------
            3 |               0 |                       1
  (1 row)
  
  user_testing=> select projection_name, node_name, verified_fault_tolerance, is_up_to_date, is_segmented from projections where anchor_table_name = 'cluster';
   projection_name | node_name | verified_fault_tolerance | is_up_to_date | is_segmented 
  -----------------+-----------+--------------------------+---------------+--------------
   cluster_p_b0    |           |                        1 | t             | t
   cluster_p_b1    |           |                        1 | t             | t
   cluster_b0      |           |                        1 | t             | t
   cluster_b1      |           |                        1 | t             | t
  (4 rows)
  

  0
• Jim_Knicely - Select Field - Administrator

  March 2018

  That all looks fine.

  So what do the projections looks like?

  select export_objects('','cluster');
  select export_objects('','cluster_p');
  

  0