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Questions tagged [autovacuum]

Postgres Autovacuum Daemon

PostgreSQL has an optional but highly recommended feature called autovacuum, whose purpose is to automate the execution of VACUUM and ANALYZE commands. When enabled, autovacuum checks for tables that have had a large number of inserted, updated or deleted tuples. These checks use the statistics collection facility; therefore, autovacuum cannot be used unless track_counts is set to true. In the default configuration, autovacuuming is enabled and the related configuration parameters are appropriately set.

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auto vacuum vs vacuum in postgresql

Postgresql has the functionality of Vacuum for recollecting the space occupied by dead tuples. Auto vacuum is on by default and runs according to the configuration setting. When I check the output of pg_stat_all_tables i.e. last_vacuum and…
YogeshR
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Postgresql explicit VACUUM vs. auto-VACUUM: Differences? Recommendations?

Quick question from a PostgreSQL (relative) newb: We run a batch process that, as its final step, deletes most of the previous batches. Disk space is a concern, so we need to ensure that PostgreSQL cleans up after itself. Other than forcing…
Jim Burnell
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Tuning autovacuum for update heavy tables

I have a very update heavy table. The problem is that the table grows a lot, as the autovacuum can not catch up. The autovacuum kick in every 2 minutes, so it is running file. I have an application which is making like 50k updates(and a few…
Georgi
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delete rows and get space postgresql

I'm not that experienced with postgresql. Did a simple command with DELETE FROM table_name where some_condition; There are thousands of rows involved. But after that command actually, the disk space got even smaller. Any Idea what is going wrong?…
MichaelRazum
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Postgresql: Autovacuum partitioned tables

We have a very large table that was partitioned into monthly tables. We have no autovacuum parameters set in the postgresql.conf file, so it's on by default with default parameters. The past months tables table_201404, table_201403 do not get…
dsmorey
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Postgresql Autovacuum. Is it necessary to to activate explicitly in Postgresql.conf

For the postgres SQL >=9.0 the Autovacuum is by default ON and we can check it, but in postgresql.conf the status of Autovacuum is not ON #autovacuum = on # Enable autovacuum subprocess? 'on' Is it neccessary to turn autovacuum on…
user2012749
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Postgresql: LOG: autovacuum launcher started is hung (apparently)

I am working on this Heroku tutorial and I have a question about autovacuum process. There is still no tables or data and autovacuum launcher is hung for over half an hour now. Below is the cmd window. I found a similar question here but could not…
Zeynel
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Long Aurora autovacuum on postgres system tables

We have had an incredibly long running autovacuum process running on one of our smaller database machines that we believe has been using a lot of Aurora:StorageIOUsage: We determined this by running SELECT * FROM pg_stat_activity WHERE…
Brian
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PostgreSQL index bloat ratio more than table bloat ratio and autovacuum_vacuum_scale_factor

Index bloats are reaching 57%, while table bloat is 9% only and autovacuum_vacuum_Scale_factor is 10% only. what is more surprising is even primary key is having bloat of 57%. My understanding is since my primary key is auto incrementing and single…
Monika Yadav
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sqlite incremental vacuum removing only one free page

I have changed value of auto_vacuum PRAGMA of my sqlite database to INCREMENTAL. When I run PRAGMA incremental_vacuum; through 'DB Browser for SQlite' application it frees all the pages in the free_list. But when I am running same statement using…
Shashank Choudhary
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Postgres faster autovacuum

I have a very large table, 400MM records, that normally only receives inserts. However, recently I have to make a lot of updates to the records to complete a task. This is creating a lot of dead tuples. I have updated the global configs to the…
fcol
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Postgresql - large delete from 500Gb DB / auto-vacuum?

I need to delete around 80% of my 500Gb Postgresql DB. I have successfully run a delete command for around 50Gb of rows so far, and paused before proceeding. (This took a long time, perhaps one hour) I notice that after deleting around 50Gb of data,…
jsstuball
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PostgreSQL vacuuming a big table

I have Postgres 9.4.7 and I have a big table ~100M rows and 20 columns. The table queries are 1.5k selects, 150 inserts and 300 updates per minute, no deletes though. Here is my autovacuum config: autovacuum_analyze_scale_factor…
Max Selivanov
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Postgres wraparound prevention on unchanged table

Postgresql documentation on vacuum states that Frozen row versions are treated as if the inserting XID were FrozenTransactionId, so that they will appear to be “in the past” to all normal transactions regardless of wraparound issues, and so such…
Peter
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Did postgres vacuum improve my query plan

I have a table store_record with 45 million records. I want to run a simple count query on the largest database_id. Note I have an index on database_id. SELECT COUNT(*) FROM store_record WHERE database_id='123'; -- returns ~17.2 million The query…
Johnny Metz
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