Postgres Delete Too Slow

Postgres delete is super slow how to improve Stack Overflow

2 I thought I should try deleting in batches so I ran explain analyze delete from test t1 where t2 id x and id 10 and found that my n to n junction tables 6 of them where missing FK indexes It spent around 3 4s searching for FKs After adding indexes on junction tables total deletion time came down to 40 minutes

Postgresql table drop taking very long time Server Fault, Save this answer Show activity on this post Dropping your table is cascading through a constraint Postgres is most likely bound up examining rows in that referencing table to determine what it needs to do about them To speed things up you can drop your constraints first and or TRUNCATE the table you want to drop

PostgreSQL 9 5 2 DELETE taking forever

PostgreSQL 9 5 2 DELETE taking forever on a table with 20k rows w 10k affected rows but it has been running for 2000 seconds takes a few ms I have a few other tables with FOREIGN KEY s pointing to this id and I had some previous records pointing to it but they have already been deleted check if the table is locked using the answer in

Very slow DELETE in PostgreSQL workaround HackerThink, The best option is to run a batch delete so that triggers are not hit Disable the triggers before deleting then re enable them This saves you a very large amount of time For example ALTER TABLE tablename DISABLE TRIGGER ALL DELETE ALTER TABLE tablename ENABLE TRIGGER ALL A major key here is you want to minimize the depth of subqueries

PostgreSQL DELETE SQL too slow

PostgreSQL DELETE SQL too slow , I m having problems with delete commands in postgres They are too slow I m trying to delete a set o 300

Postgresql Postgres Greatest n per group Is Slow Stack Overflow

Most efficient way of bulk deleting rows from postgres

Most efficient way of bulk deleting rows from postgres I m wondering what the most efficient way would be to delete large numbers of rows from PostgreSQL this process would be part of a recurring task every day to bulk import data a delta of insertions deletions into a table

Sql Postgres Left Join With And Condition Too Slow Stack Overflow

Postgres Visualize Slow Queries

Assuming that the columns are not nullable the query can be simplified without the self join to using either NOT IN or NOT EXISTS DELETE FROM cards WHERE available FALSE AND id NOT IN SELECT card id FROM game results DELETE FROM cards AS c WHERE c available FALSE AND NOT EXISTS SELECT FROM game results AS gr WHERE gr card id c id PostgreSQL DELETE query hangs and so does EXPLAIN ANALYZE . Ok the issue was a index bloat Running select from transaction where reverses 12 shows the query planner running a slow seq scan rather than using the table Reindexing the table resolves the issue and a replay of the select now uses index scan as you d expect The following completes in 0 04ms reindex table transaction begin delete Postgresql delete ALTER TABLE mytable ENABLE TRIGGER ALL 1 The usual advice when you complain about slow bulk deletions in postgresql is make sure the foreign keys pointing to the table you are deleting from are

Postgres Visualize Slow Queries

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