Questions tagged [vacuum]
The vacuum command in postgres releases unused space. Be sure to also include the [postgres] tag, and version tag such as [postgresql-9.6]. Include an operating system tag,
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Is it possible to never run vacuum full in PostgreSQL
Since a VACUUM FULL locks tables, it is unacceptable for us in our production environment.
Is it possible to only run VACUUM and never VACUUM FULL on a production system?
Does VACUUM make space ...
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Is it necessary to ANALYZE a table after an index has been created?
In my transaction, I am creating a temporary table:
create temporary table x on commit drop as
select ...
I also add an index on that table:
create index on x(some_column);
Is it now necessary to ...
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Stored Procedure for Vacuum in PostgreSQL
I want to create a stored procedure to trigger vacuum, I know there are many ways to automate vacuum, but I would like to use the stored procedure (Postgresql 9.6).
The problem Im facing is, I can't ...
CommunityBot
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How do we get around PostgreSQL autovacuum taking a table-level lock ACCESS EXCLUSIVE on replicas?
We are running:
user@primary/client-n:~$ psql -d database -c "SELECT version();"
version
--------------------------------------------...
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Index maintenance on pg_catalog tables in AWS RDS
I have had some bad historical usage on my Aurora PostgreSQL instance. Namely, connections that create a lot of temporary objects and some very long running transactions (which limits autovacuum).
Now ...
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Will Postgres reclaim space when a temporary table is dropped?
I'm using a large number of TEMP TABLES and want to make sure I'm not leaking storage.
I create and use the table in a transaction with CREATE TEMP TABLE mytable ... ON COMMIT DROP.
I'm having trouble ...
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PostgreSQL 14 blocked
I have a fairly serious problem with PostgreSQL, it happens at intervals of a few days that some tables on my PostgreSQL instance crash, or rather this is my feeling.
Linked queries are very slow.
...
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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 ...
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PostgreSQL difference between VACUUM FULL and CLUSTER
I have a table with 200 GB of size occupied by data and 180 GB of size by the 6 indexes on it. It is 30% bloated, so I want to reclaim unwanted space occupied by it. It is clustered on job_id_idx ...
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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 ...
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Long running VACUUM VERBOSE in Postgres 9.5 - how much time remaining?
I am vacuuming a very large (718GB) table containing a lot of dead tuples and 4 indexes.
VACUUM ANALYSE VERBOSE bigtable;
This vacuum has been running for over 11 hours (!) now and I am trying to ...
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Postgres - What is a vacuum delay?
I'm running Postgres 14.6, and have a number of sessions with a wait event described as Timeout: VacuumDelay. The SQL being run by the session is....
autovacuum: VACUUM public.mytable_202110 (to ...
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postgres manual vacuum and auto vacuum running on the same table
I kicked off a manual vacuum on a 19TB table we have been having problems with 18 days ago.
Since then I have discovered that the auto vacuum for this also has triggered and is on wait_event = ...
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Postgres database insert become slow after 10 days, and then it needs a full vacuum
We have a postgres database which is almost 15GB's in size after vacuum. With a dedicated hardware i,e 32GB of ram with 12 Cores. The data automatically gets inserted around 300k inserts per day, and ...
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Why is changing the type of column causing extensive autovacuum?
I changed the type of a column from varchar to uuid in a table with a couple of million rows. This caused quite an extensive autovacuum.
Can somebody explain why this is required and should I have ...
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Disk space and performance issues while updating a PostgreSQL table with over 120 million rows
I have a single table with an approximate size of 85gb and roughly around 120 million of rows (in a PostgreSQL (12.8) database).
I need to update all 120 something million rows with an update query to ...
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VACUUM is significantly slower in Postgresql 13 compared to Postgresql 12
After switching to Postgresql 13 (13.6) from Postgresql 12 (12.10), we noticed that the manual VACUUM operation takes significantly more time, often more than double compared to Postgresql 12. Which ...
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Why do postgres DELETEs take up space?
My postgres DB has 20 GB of storage space available but when running a DELETE the space decreases to ~4 GB before increasing again to ~14 GB. I understand that deletions will not return reclaimed ...
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VACUUM takes very long and can not be cancelled
I just issue this command to a table and its been an 2 hours but not finished: vacuum verbose people_data
I can not even cancel the process because I can not see the PID using this query:
SELECT pid,
...
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Reclaim space after a failed VACUUM FULL
I made small miscalculation and my VACUUM FULL ended up filling the disks of the instance. I managed to free enough space to restart postgres but I am afraid it won't be enough to run VACUUM FULL to ...
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What performance advantages does append-only postgres allow?
Suppose we have a Postgres Database with only a single table. It is known that no UPDATE statements will ever be run on it, nor will any DELETEs. It is 100% append-only.
Some databases exist that rely ...
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Table Toast data is growth out of control
We are using PostgreSQL version 11 in our production environment. And we are running out of disk space because of Postgres. When I check the table sizes in my DB with this query I saw that the ...
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Reclaim disk space from dropped column without downtime
I have a heavily used table (with around 5 million rows) in a PostgreSQL database in which I want to drop a column and reclaim the space the column used.
The docs suggest doing a table rewriting ...
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Why wouldn't VACUUM ANALYZE clear all dead tuples?
We run a "manual" VACUUM ANALYZE VERBOSE on some of our larger tables after we do major DELETE/INSERT changes to them. This seems to work without issue although sometimes a table's VACUUM job will run ...
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autovacuum for postgresdb takes a lot of resource on production
On our production database autovacuum runs whenever it's needed. The problem is sometime it runs during the day which is the peak time. Looked at lots of difficult articles on web, we should always ...
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Is there a way to VACUUM an sqlite3 database in parts to avoid OperationalError: database or disk is full/reduce size of sqlite3 databse
I have a rather large sqlite3 database that I've built/populated through python over a few months. I have done many inserts/deletes etc while putting it together and it now uses the majority of my ...
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Vacuum on large table sometimes takes very long
In a PostgreSQL 11 database server I have a large table (932 million rows, 2150GB, not partitioned) into which I insert about 2-3 million rows every night with a batch job. The table was created with ...
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VACUUM FULL using another disk
Current database takes almost all of SSD free space ~802GB. 800 GB of memory is taken by single table and it was never vacuumed since 2019. Recently i deleted old rows from the table and now i need to ...
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VACUUM FULL alternatives on Windows PGSQL (pg_repack, pg_squeeze, ... )
I have a big table which needs a Vacuum full, but I don't have enough disk space.
I was looking online and came across some: pg_repack, pg_squeeze, ...
Am I mistaken or are all these extensions Linux ...
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Full vacuum on big table (2.7 TB)
I have big database which contains a table of 2.7TB of data. I deleted some records, and I want to reclaim the disk space.
However, i only have about 200 gb free disk space left. How can I do this?
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Issue in retrieving disk space post deleting records of Postgres DB, even after running VACUUM on database [duplicate]
My Postgres db was utilizing ~305 gb of space due to data of last 2-3 years, I went ahead and deleted last 2 year data and ran VACUUM, current used disk space is also ~305 gb even after VACUUM has ...
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How to reduce disk usage on a RDS Postgres instance after a significant increase following a VACUUM(FULL, ANALYZE, VERBOSE)?
We have a Postgres 13 database that has been slowly but steadily increasing its disk usage on Amazon RDS. Right before a VACUUM(FULL, ANALYZE, VERBOSE) command it was ~300 GB, but afterwards it jumped ...
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PostgreSQL did not released space "UPDATE set column = null", vacuum did not worked too
I have a huge table that I cannot delete the rows, only update the columns that are storing huge base64 data, that I should update to null to try to release space.
So I programmed a script that are ...
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Does UPDATE write a new row version for unchanged, TOASTed values?
I am working with a PostgreSQL table with a large TEXT field, which is theoretically updated on a regular basis. I have thought about storing the data directly in the filesystem, but with TOAST, the ...
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Ringstorage: DELETE based on table usage
I am very new to LARGE DATABASE related stuff and Postgres,
We plan to have a Postgres db with a million of rows that can grow up to Terabytes because rows include binary data (images).
We plan to ...
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Production PostgreSQL Space Issue, Huge pg_largeobject, Newbie Thrown Off the Deep End! [closed]
Server:
PG 9.4, Linux, poorly/defaultly setup, no care and feeding
Databases:
6 user databases, all on pg_default
CT database: ~435GB
pg_largeobject in that DB
table size: 427GB
total size: 433GB
...
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What happens during auto vacuum / vacuum in PostgreSQL?
The official documentaion here seemed quite cryptic to me. https://www.postgresql.org/docs/13/routine-vacuuming.html#AUTOVACUUM
Can someone offer an explanation of what happens under the hood during ...
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Postgres Vacuum in Function
After googleing a bit, it's plainly clear you cannot run vacuum from a function:
Postgres mailing - Vacuum behaviour in plpgsql function
You can't run VACUUM from inside a function because of ...
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Autovacuum on tables with high-volume updates
I have a database with two tables where every 5 minutes the entire content of those tables is updated (mainly just a single column). The biggest of the two tables has about 170K rows. The autovacuum ...
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Postgres 9.4.5 small table grows into huge size - periodic VACUUM FULL needed
We are running a PostgreSQL database on Windows Server. The database version is 9.4.5 (it's been running stable for a long time now so we aren't updating it).
Some of our tables have millions of rows,...
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Postgres slow query on nullable index
Postgres version: 12.7
Table definition:
column_name, data_type, is_nullable
"id", "integer", "NO"
"data",...
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postgresql vacuum analyze on restored snapshot
Frequently we restore a Postgres DB from a RDS snapshot to an entirely new RDS instance. We notice that queries on certain tables perform really slowly but improve by a huge magnitude after running ...
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Preventing Transaction ID Wraparound with vacuum freeze
I recently got few DBs to maintain. I just come up about this "Preventing Transaction ID Wraparound Failures". I checked my DBs and got the numbers:
I did vacuumdb -a -v on this DB, and ...
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vacuum freeze PostgreSQL
Sometimes I find it difficult to understand postgreSQL documentation.
Now, VACCUM section (https://www.postgresql.org/docs/10/sql-vacuum.html) says this phrase "Aggressive freezing is always ...
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Postgres LISTEN transaction prevents auto-vacuum from clearing dead tuples
At work, we have a database table we use for queued jobs, so it sees a lot of throughput. One issue we've run into is that after a weekend without any code changes, the indexes on this table fill with ...
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In PostgreSQL, if crashes during VACUUM, will it recover from a checkpoint that is before the frozen transaction ID of VACUUM?
When VACUUM starts, it will calculate a frozen transaction ID and freeze all tuples older than it. Will this frozen TXID be younger than the latest checkpoint?
If this is the case, then when the ...
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Are reportedly "bloated" index sizes a problem?
I create a table with 1 million records, then I delete those records. (Common with some sort of processing list.)
CREATE TABLE example (id int PRIMARY KEY);
INSERT INTO example SELECT generate_series(...
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Is vacuuming a PostgreSQL materialized view necessary?
I understand it makes sense to analyze a Materialized View (MV), but since MVs are not updateable, does that imply that we need not ever vacuum a MV?
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Do I need to Vacuum DB after massive insert?
I use Postgres 12.7
I did massive insert using CopyManager.
Input: 320GB of tab separated data
Sample row is:
2021-03-16T07:14:41.121000 588467 1900000 0 0 0 0 S 0 LITTLE_CHAR
-- ...
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VACUUM returning disk space to operating system
VACUUM usually does not return disk space to operating system, except in some special cases.
From the docs:
The standard form of VACUUM removes dead row versions in tables and indexes and marks the ...
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