How gaussdb counts the response time of user SQL

adopt PGXC_SQL_COUNT View , It can display in real time SELECT、INSERT、UPDATE、DELETE、
MERGE INTO Five kinds SQL、 as well as DDL、DML、DCL Node level and user level statistics results of the statement , knowledge
Do not use the current heavy business load query type , Measures the ability of the entire cluster and a single node to perform certain types of queries
force . By analyzing the above categories SQL Query count and response time statistics , Get the statistical results at the specified time ,
After calculation, the specified QPS Wait for Statistics . for example ,T1 moment ,USER1 Of SELECT The counting result is
X1,T2 The moment is X2, Then the user can be calculated SELECT Of the query QPS The value is (X2-X1)/(T2-T1). from
this , The cluster user level is available QPS Graph and cluster throughput , Monitor whether the business load of each user is sent
Have a drastic change . If there is a drastic change , You can locate specific statement types (SELECT/INSERT/UPDATE/
DELETE/MERGE INTO). Simultaneous observation QPS The curve can tell when the problem occurs , Combined with other work
have , Locate the problem . Ability to tune cluster performance 、 Provide basis for problem positioning .

PGXC_SQL_COUNT Definition

name	type	describe
node_name	name	The name of the node
user_name	name	user name
select_count	bigint	SELECT Number
update_count	bigint	UPDATE Number
insert_count	bigint	INSERT Number
delete_count	bigint	DELETE Number
mergeinto_count	bigint	MERGE INTO Number
ddl_count	bigint	DDL Number
dml_count	bigint	DML Number
dcl_count	bigint	DCL Number
total_select_elapse	bigint	SELECT Total response time
avg_select_elapse	bigint	SELECT Mean response time
max_select_elapse	bigint	SELECT Maximum response time
min_select_elapse	bigint	SELECT Minimum response time
total_update_elapse	bigint	UPDATE Total response time
avg_update_elapse	bigint	UPDATE Mean response time
max_update_elapse	bigint	UPDATE Maximum response time
min_update_elapse	bigint	UPDATE Minimum response time
total_delete_elapse	bigint	DELETE Total response time
avg_delete_elapse	bigint	DELETE Mean response time
max_delete_elapse	bigint	DELETE Maximum response time
min_delete_elapse	bigint	DELETE Minimum response time
total_insert_elapse	bigint	INSERT Total response time
avg_insert_elapse	bigint	INSERT Mean response time
max_insert_elapse	bigint	INSERT Maximum response time
min_insert_elapse	bigint	INSERT Minimum response time