[AMBARI-15011] Decrease the load on ambari database after cluster creation

• Type: Improvement
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.2.2
• Component/s: ambari-server
• Assignee: Sebastian Toader
• Reporter: Sebastian Toader
• Created: 11/Feb/16 12:25
• Updated: 25/Feb/16 18:10
• Resolved: 19/Feb/16 22:08

Description

Decrease the load generated by queries that are periodically executed after cluster creation.

Queries executed frequently:

SELECT t0.service_config_id, t0.cluster_id, t0.create_timestamp, t0.group_id, t0.note, t0.service_name, t0.user_name, t0.version, t0.stack_id FROM serviceconfig t0 WHERE ((t0.cluster_id = @P0) AND (t0.create_timestamp = (SELECT MAX(t1.create_timestamp) FROM serviceconfig t1 WHERE (((t1.service_name = t0.service_name) AND (t1.cluster_id = @P1)) AND (t1.group_id IS NULL))))) 

SELECT MAX(t0.skippable), MIN(t1.start_time), MAX(t1.end_time), t1.stage_id, SUM(CASE  WHEN (t1.status = @P0) THEN @P1 ELSE @P2 END), SUM(CASE  WHEN (t1.status = @P3) THEN @P4 ELSE @P5 END), SUM(CASE  WHEN (t1.status = @P6) THEN @P7 ELSE @P8 END), SUM(CASE  WHEN (t1.status = @P9) THEN @P10 ELSE @P11 END), SUM(CASE  WHEN (t1.status = @P12) THEN @P13 ELSE @P14 END), SUM(CASE  WHEN (t1.status = @P15) THEN @P16 ELSE @P17 END), SUM(CASE  WHEN (t1.status = @P18) THEN @P19 ELSE @P20 END), SUM(CASE  WHEN (t1.status = @P21) THEN @P22 ELSE @P23 END), SUM(CASE  WHEN (t1.status = @P24) THEN @P25 ELSE @P26 END), SUM(CASE  WHEN (t1.status = @P27) THEN @P28 ELSE @P29 END), SUM(CASE  WHEN (t1.status = @P30) THEN @P31 ELSE @P32 END) FROM stage t0, host_role_command t1 WHERE ((t0.stage_id = t1.stage_id) AND (t0.request_id = t1.request_id)) GROUP BY t1.request_id, t1.stage_id HAVING (t1.request_id = @P33)

SELECT DISTINCT t0.task_id FROM host_role_command t0, hosts t1 WHERE ((((t1.host_name = @P0) AND (t0.role = @P1)) AND (t0.status = @P2)) AND (t1.host_id = t0.host_id)) ORDER BY t0.task_id

SELECT DISTINCT task_id FROM host_role_command WHERE ((role = @P0) AND (status = @P1)) ORDER BY task_id

SELECT COUNT(task_id) FROM host_role_command WHERE (status IN (@P0,@P1,@P2,@P3,@P4,@P5))

Issue Links

• breaks: AMBARI-15173 Express Upgrade Stuck At Manual Prompt Due To HRC Status Calculation Cache Problem
• links to: ReviewBoard