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8
votes
4answers
6k views

Aggressive Autovacuum on PostgreSQL

I'm trying to get PostgreSQL to aggressively auto vacuum my database. I've currently configured auto vacuum as follows: autovacuum_vacuum_cost_delay = 0 #Turn off cost based vacuum ...
11
votes
3answers
5k views

Are regular VACUUM ANALYZE stil recommended under 9.1?

I'm using PostgreSQL 9.1 on Ubuntu. Are scheduled VACUUM ANALYZE still recommended, or is autovacuum enough to take care of all needs? If the answer is "it depends", then: I have a largish database ...
4
votes
2answers
670 views

PostgreSQL unexplained table bloat

I have a table in a Postgres 8.2.15 database. The table bloated to almost 25GB but after running vacuum full and cluster the table size was dramatically smaller, well under 1GB. A few weeks later ...
3
votes
1answer
2k views

I need to run VACUUM FULL with no available disk space

I have one table that is taking up close to 90% of hd space on our server. I have decided to drop a few columns to free up space. But I need to return the space to the OS. The problem, though, is ...
3
votes
1answer
545 views

PostgreSQL 9.2: vacuum returning disk space to operating system

Vacuum usually does not return disk space to operating system, except some special cases. From the docs: The standard form of VACUUM removes dead row versions in tables and indexes and marks the ...
1
vote
3answers
2k views

Should I manually VACUUM my PostgreSQL database if autovacuum is turned on?

I use software which makes a big PostgreSQL database (there is a table with a million rows in it) and the developers says I should VACUUM and ANALYZE periodically. But the PostgreSQL database default ...
2
votes
1answer
496 views

Dropping indexes doesn't seem to release space to the OS. Can it?

I'm running PostgreSQL 9.1. I have noticed really alarmingly bad indexes are taking up a lot of space on my server, e.g: evlampts=# SELECT pg_size_pretty(pg_relation_size('mcdata_2011_07')) AS ...
1
vote
2answers
183 views

Vacuum vs Auto Vacuum

I am trying to find answers for my below few queries which will help me in fine tuning my postgres DB. I did some googling but was not able to find answer. 1) Out of vacuum or Auto vacuum which is ...
0
votes
1answer
110 views

“Truncate” or “Delete/Vacuum Full” for deleting some of the table rows

I have a db which has 223 tables and I have to delete some of the records from 10 of them, each has apprx. 1.5million records. Those tables are storing the temperatures every 7seconds. We have decided ...