vacuum

I'm using a PostgreSQL DB and I would like to start VACUUM FULL using JPA EntityManager. Version 1 public void doVacuum(){ entityManager.createNativeQuery("VACUUM FULL").executeUpdate() } throws TransactionRequiredException Version 2 @Transactional public void doVacuum(){ entityManager.createNativeQuery("VACUUM FULL").executeUpdate() } throws PersistenceException "VACUUM cannot run inside a transaction block" Version 3 public void doVacuum(){ entityManager.createNativeQuery("VACUUM FULL").getResultList() } vacuum is performed but after that I get PersistenceException "No results" What is the

Reading the Amazon Redshift documentatoin I ran a VACUUM on a certain 400GB table which has never been vacuumed before, in attempt to improve query performance. Unfortunately, the VACUUM has caused the table to grow to 1.7TB (!!) and has brought the Redshift's disk usage to 100%. I then tried to stop the VACUUM by running a CANCEL query in the super user queue (you enter it by running "set query_group='superuser';") but although the query didn't raise an error, this had no effect on the vaccum query which keeps running. What can I do? Apparently, currently there is not much you can do. I was

I want to know how to vacuum sqlite database. I tried a syntax MANUAL VACUUM command for the whole database from command prompt: $sqlite3 database_name "VACUUM;"; But it's giving error as: near "database_name": syntax error. and also AUTO VACUUM: PRAGMA auto_vacuum = INCREMENTAL; And tried it for a particular table as: VACUUM table_name; But no result. SHANK You don't to specify the table name in the syntax. Only VACUUM works. Also, it will clean the main database only and not any attached database files. For more info, refer to the SQLite documentation . Give the command like this: $sqlite3

By design, Core Data does not issue a VACUUM SQL command to its SQLite database(s), as detailed here . I'm creating a Core Data application that'll store, and later delete, large binary files (2-10MB in size) in a SQLite db. Over time this will lead to fragmentation and a larger-than-necessary SQLite database. I'd like to periodically issue a VACUUM command, say, during a cleanup operation I run. How can I progmatically issue a VACUUM command to Core Data's SQLite stores? Is it possible to do this through Core Data, or must I mount the SQLite db and connect to it directly to execute the VACUUM

I am using Python with psycopg2 and I'm trying to run a full VACUUM after a daily operation which inserts several thousand rows. The problem is that when I try to run the VACUUM command within my code I get the following error: psycopg2.InternalError: VACUUM cannot run inside a transaction block How do I run this from the code outside a transaction block? If it makes a difference, I have a simple DB abstraction class, a subset of which is displayed below for context (not runnable, exception-handling and docstrings omitted and line spanning adjustments made): class db(object): def __init__

We have a postgres database in Amazon RDS. Initially, we needed to load large amount of data quickly, so autovacuum was turned off according to the best practice suggestion from Amazon . Recently I noticed some performance issue when running queries. Then I realized it has not been vacuumed for a long time. As it turns out many tables have lots of dead tuples. Surprisingly, even after I manually ran vacuum commands on some of the tables, it did not seem to remove these dead tuples at all. vacuum full takes too long to finish which usually ends up timed out after a whole night. Why does vacuum