1 PostgreSQL MAX() inner query really slow 0 Very slow query against view in postgres - possible to enhance? 1 Performance Issue with finding recent date of each group and joining to all records 2 PostgreSQL: query with join and group by is taking too long 0 Slow query when joining...
I am currently trying to migrate a system to postgres and I am unfortunately not able to understand why a specific query is running so incredibly slow. Both in Transact-SQL and Oracle the same query runs in under 200ms. First things first though, I have a big table with14.000.000 entries...
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While a perfect logging configuration will be a matter of trial and error, what I have explained here is how you can log queries and query Your feedback and questions are welcome! You can always reach out to our team of Postgres experts at Ask Azure ...
Enabling PostgreSQL Slow Query Log on other environments Open thepostgresql.conffile in your favorite text editor. To find the file's path, run the command:psql -U postgres -c 'SHOW config_file' Search for the line:#log_min_duration_statement = -1 ...
# service postgresql reload 1. Go to the directory where the logs of PostgreSQL are (comonly located in /var/lib/pgsql/data/pg_lo) and look for the lasted log file created. Below, you will find an example of a query that took more than 500ms: ...
analyse: Updates the query planner In postgres.conf, the autovacuum property is commented out, but the documentation states that this is on by default, so my presumption is that even though it's commented out, it should still be on? Can someone explain why the tables wouldn't be getting ...
(query_id) TABLESPACE pg_default;CREATEINDEX base_image_created_idxONpublic.base_imageUSINGbtree (created) TABLESPACE pg_default;CREATEINDEX base_image_created_imageid_queryidONpublic.base_imageUSINGbtree (id, created, query_id) TABLESPACE pg_default;CREATEINDEX base_image_id_idxONpublic.base_im...
slow-query-log-file = /home/db/madb/log/slow-query.log long_query_time = 1 20170314补充: 发现慢查询后,可根据sql语句的where条件来为表增加索引,提升查询效率。 比如:slow-query.log显示一条慢查询sql: select count(id) from tb_user where time>'2017-03-14 00:00:00'; ...
当主从复制采用 binlog 的行模式时,如果从库启用 slow_query_log、log_slow_replica_statements 且从库重放 CREATE TABLE、DROP TABLE 时因特殊情况(比如被从库其他 SQL 占用 MDL 锁)执行耗时较长,会被从库记录到慢日志(slow log),而 ALTER TABLE 却不会被记录到慢日志。