agens-graph - 如何在 AgensGraph 上查找慢查询？

Question

我正在 AgnsGraph 上开发图形应用程序，并且交易性能不佳。我想从 AgensGraph 的日志中列出长期查询。

如何从日志中提取慢查询？

Answer 1

你可以试试AgensGraph的statement log。

首先，更改“postgresql.conf”上的参数

log_duration = on
log_statement = 'all'

二、重启AgensGraph。

$ ag_ctl stop
waiting for server to shut down.... done
server stopped
$ ag_ctl start
server starting

最后，运行查询并检查日志文件。

agens=# set graph_path to graph;
SET
agens=# create view temp as select gs from generate_series( 1, 1000000 ) gs;
CREATE VIEW
agens=# load from temp as gs create (:n{id:gs});
GRAPH WRITE (INSERT VERTEX 1000000, INSERT EDGE 0)
agens=# \quit

对长持续时间值的过滤语句。

LOG:  statement: set graph_path to graph;
LOG:  duration: 0.296 ms
LOG:  statement: create view temp as select gs from generate_series( 1, 1000000 ) gs;
LOG:  duration: 9.859 ms
LOG:  statement: load from temp as gs create (:n{id:gs});
LOG:  duration: 20194.808 ms