Questions tagged [autovacuum]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
13
votes
1answer
12k views

Does cancelling an (AUTO)VACUUM process in PostgreSQL make all the work done useless?

In some occasions, and after making a massive update, insert or delete from a table, I have started a VACUUM FULL ANALYZE to make sure the DB was not getting too bloated. Doing it in a production ...
9
votes
1answer
2k views

Debug query on big table that is sometimes slow

I have a web API that is backed by a Postgres database, and the performance is generally very good. I monitor the performance of both the database and the application as a whole. Most of my queries (...
7
votes
1answer
5k views

Should I disable autovacuum on a table while I do a bulk update?

I need to perform a simple update on all rows in a table. The table has 40-50 million rows. Dropping indexes and constraints during the UPDATE results in a massive performance improvement. But what ...
7
votes
1answer
2k views

Postgres long autovacuum halting database

I have a fairly large table (1 million rows) and my database is stuck on an autovacuum (>30 mins) on the this table, causing the whole database to chock. Application won't even load now. -00:37:31....
6
votes
1answer
691 views

Tiny table causes extreme performance degradation, fixed by forced VACUUM. Why?

I use PostgreSQL 9.6. I have a query that joins 17 tables, 9 of those having several million rows. The query was running fine but its performance degraded rapidly this week. EXPLAIN's output didn't ...
5
votes
1answer
418 views

Will autovacuum block DROP or TRUNCATE?

When the autovacuum process is vacuuming a large table, will queries like DROP and TRUNCATE be blocked until vacuuming completed? In the documentation,it says Also, the standard form of VACUUM can ...
4
votes
0answers
175 views

PostgreSQL autovacuum ignoring “inactive” tables resulting in “transaction id wraparound”

I have a PostgreSQL database with a lot of tables (currently 93k) and I'm seeing issues with transaction id age threatening wraparound, because autovacuum is not getting triggered for clean tables ...
3
votes
1answer
532 views

Do the different “types” of autovacuum have different performance characteristics?

In monitoring the autovacuum activity on my database, I've noticed that autovacuums tagged with (to prevent wraparound) seem to take longer than "regular" autovacuums. That got me started trying to ...
3
votes
1answer
3k views

Postgres auto analyze performance

On postgresql 9.4 I have a table that never has any updates or deletes, only inserts and selects. It therefore never gets auto vacuumed, but it does still get auto analyzed and when it does it can ...
3
votes
1answer
633 views

Are autovacuum VACUUMs slower than a manual VACUUM?

I have a few large tables that take days to autovacuum, sometimes resulting in poor performance until the vacuum finishes. Most of the recommendations I've seen mention doing a manual VACUUM during ...
3
votes
1answer
819 views

PostgreSQL ERROR: cannot freeze committed xmax

First of all, I am new to PostgreSQL database. In my PostgreSQL log I can see errors bellow and I don't know what is wrong or what I should change. 2018-03-29 10:54:38 CEST::@:[5059]: CONTEXT: ...
2
votes
1answer
181 views

Postgres - autovacuum in small tables

What would be a suitable setting for autovacuum to act on this table? We have a "sequencia" table, it does what the sequence of postgres should do, but perhaps by using other DBs the development ...
2
votes
1answer
2k views

'text search dictionary “unaccent” does not exist' entries in postgres log, supposedly during automatic analyze

I have many such entries in the postgresql main log, ever since upgrading to Postgres 10: 2018-03-28 08:51:00.281 CEST [97547] ERROR: text search dictionary "unaccent" does not exist 2018-03-28 08:...
2
votes
2answers
67 views

PostgreSQL 9.6.12 autovacuum constantly running on system tables

I come from a SQL Server, Oracle, Sybase DBA background but I am now looking into an AWS Aurora cluster running PostgreSQL 9.6.12 and have noticed something which I think is odd, but maybe it's not, ...
2
votes
0answers
219 views

How do I fix multixact wraparound after it has already occurred?

I have a database which has a single table for which MultiXact wraparound has already occurred. Neither manual vacuums nor automatic vacuums are able to fix this condition. Manual vacuums fail almost ...
2
votes
0answers
776 views

Autovacuum gets exclusive lock and replayed in the slave and lead to system fault

I had trouble in my environment which is related to autovacuum and now I think I understand how this occurs. However, this is kind of a rare issue and so I want to get some advice regarding this issue....
2
votes
0answers
657 views

Postgresql 9.6 autovacuum blocks all update operations

I have a table with following definition: CREATE TABLE public.json_stream_packet_filter ( stream_packet_id bigint NOT NULL, filter_data jsonb, CONSTRAINT json_stream_packet_filter_pkey PRIMARY ...
2
votes
0answers
330 views

On PostgreSQL 9.5, does partitioning a table prevent autovacuum from automatically running ANALYZE?

I'm trying to grasp the following sentence from https://www.postgresql.org/docs/9.5/static/sql-analyze.html The autovacuum daemon, however, will only consider inserts or updates on the parent table ...
1
vote
1answer
3k views

When is Postgres autovacuum executed

I am using an older version of Postgres (8.4.20). I know that the autovacuum process is executed frequently to free disk space of queries that deleted or updated data in tables. I have a database ...
1
vote
1answer
593 views

Why disable Postgres Autovacuum?

I've got a task to work with a 9.6 Postgres DB, and for some reason Autovacuum is disabled. The database was extremely slow, and after a manual VACUUM it could breathe again. The point is, why ...
1
vote
1answer
3k views

Postgresql: Does autovacuum impact query performance? Does it apply locks which impact the performance of other queries? [duplicate]

Postgres recommends using the autovacuum to remove the dead tuples. But does running the autovacuum end up making other queries to the same table slow? Does it add locks (row or table level) which ...
1
vote
1answer
287 views

Zabbix partitioning autovacuum causes locking

I have a Zabbix database on a postgresql backend that grew to ~1TB of disk space. The Zabbix housekeeper (a process for removing old data from the tables) was running for over 18 hours so I used this ...
1
vote
1answer
198 views

Autovacuum in Postgresql database

I am trying to set up autovacuum in my postgresql 9.5 database, but table stats shows me no evidence of that. In postgresql.conf, the autovacuum is already enabled: autovacuum = on In settings, ...
1
vote
2answers
2k views

How do I grant PostgreSQL superuser access to vacuum tables?

My logs are constantly filling up with these messages for hundreds of tables: WARNING: skipping "some_table_name" --- only table or database owner can analyze it How do I perform any the following ...
1
vote
1answer
31 views

Why is autovacuum running during a VACUUM FREEZE on the whole database?

I have a 14.7 TB Postgres(9.1) database that has to endure heavy writes for prolonged periods of time. I know that I need to closely manage my transaction ids to prevent db lockup. Recently I noticed ...
1
vote
1answer
59 views

Do postgres autovacuum properties persist for DB replications?

I would like to understand postgres replication options more, and as I am doing my research, I have come across a concept of autovacuuming in efforts to create routine DB maintenance. My question is ...
1
vote
1answer
59 views

What version of PostgreSQL first implemented autovacuum?

I'm just wondering what version of PostgreSQL first implemented autovacuum.
1
vote
1answer
426 views

autovacuum challenges after upgrade to postgresql 9.6

We have a cluster with several dozen databases. It was running great on 9.3 for a year (growing over time) when we did the upgrade to 9.6 last month. Since that time, the database will freeze on ...
1
vote
2answers
35 views

How to maintain visibility of all new transactions in append-only PostgreSQL DB without scanning the whole table

Situation PostgreSQL v11 I have a database with a dozen tables. No rows are ever DELETEd or UPDATEd. A bulk of data is INSERTed to all the tables in a 'few' (up to 1,000) transactions every day. ...
1
vote
1answer
2k views

When exactly does pg_stat_all_tables.last_autovacuum get updated?

I'm looking into issues with our autovacuum settings and trying to understand last_autoanalyze and last_autovacuum from the pg_stat_all_tables. I understand autovacuum to work in an incremental way, ...
1
vote
0answers
65 views

Postgresql - Auto vacuum is disables in conf file, but still everyday its running

Im using Postgresql 9.2. I have disabled auto vacuum in Conf, but still, I can see this auto vacuum is running on few tables every day. Can anyone help me find out why its running?
1
vote
0answers
344 views

autovacuum daemon considers pg_largeobject table?

I have a table which is having oid column and few oid column's data might be frequently modified from my application. I thought, it would rewrite the data and replace with new data (basically, thought ...
1
vote
0answers
52 views

Could auto_analyze cause inconsistent (and bad) query plans?

I have a simple table which stores metadata about users in an hstore column. This table has ~1.1M rows. Table "public.stitcher_participant" Column | Type ...
0
votes
1answer
87 views

When will autovacuum work in PostgreSQL?

I tested the autovacuum in PostgreSQL. So I create a table company and insert 100 records. Then I checked the table size like, ganapathy=> \dt+ company List of relations ...
0
votes
1answer
31 views

PostgreSQL vacuum starting too late (every 100k instead of 10k dead rows)

I have a large table (50M) and autovacuum seems to work properly in general. However I started monitoring it with Datadog and I have noticed something strange: select relname, reloptions from ...
0
votes
1answer
379 views

Postgres - Vacuum doesn't complete on large/busy table

We have a decently active PG database hosted on AWS. We recently started getting notifications like the following: Transaction ID age reached 750 million. Autovacuum parameter values for [...
0
votes
1answer
84 views

Does autovaccum wake up in slave?

I cannot find the answer to question what I wrote in the title. Postgres automatically wake vacuum by autovacuum, but when it's slave does slave wake up autovacuum process?
0
votes
1answer
21 views

setup table level Autovacuuming on postgres database

I am trying to setup table level Autovacuuming on postgres database. What all metrices I need to collect and analyze specific to that particular table? I have to enable autovacuuming on all the ...
0
votes
1answer
113 views

ALTER TABLE SET LOGGED locked by autovacuum

metrics is an unlogged table that has around 3M rows, I have just executed the ALTER TABLE metrics SET LOGGED to keep this data logged. But it seems to be locked by some autovacuum running process. ...
0
votes
1answer
881 views

Postgres - autovacuum on several big tables

I have an issue with autovacuum - I have several big tables (over 10 million records) which are updated very frequently (500 updates per second). Everything works OK until bloat happen :) As I can ...
0
votes
1answer
41 views

slow autovacuum on table with binary data

I have a table with about 4M rows, but each row has some binary data that may consume up to 1Mb. The autovacuum process on this table is taking over 1.5 hours to complete, which seems way to long to ...
0
votes
1answer
235 views

What does pg_stat_activity.xact_start mean for autovacuum threads?

If I see something like: db=> SELECT datname,pid,state, (now() - query_start)::interval, query FROM pg_stat_activity where state != 'idle' and query like 'autovacuum%'; datname | pid | state | ...
0
votes
1answer
234 views

Postgres: Missing data after Binary Copy - Is VACUUM FULL required?

I'm running Postgres 9.0 on a relatively big (10TB) and old Database. I must move that database to new server hardware, so I copied the whole $PGDATA directory via rsync of a LVM Snapshot and used ...
0
votes
0answers
16 views

Why isn't autovaccum running/completing?

My PostgreSQL instance (AWS Aurora) isn't autovacuuming. Or it is, but it is somehow being interrupted or stopped. I'm not canceling any autovacuum queries (though I suppose AWS itself could be). The ...
0
votes
1answer
14 views

How can I find the cause of pg_catalog.pg_attribute constantly being vacuumed?

autovacuum seems to constantly run against pg_catalog.pg_attribute for the past week+. This seems pretty odd since we aren't doing constant table changes. How can I understand why it's doing this and ...
0
votes
1answer
60 views

Automatic vacuum fails with `ERROR: XX000: cache lookup failed for type 0`

I've been noticing something like this popping up every 15 seconds in my server logs: 2020-01-30 21:10:30 UTC::@:[24969]:ERROR: XX000: cache lookup failed for type 0 2020-01-30 21:10:30 UTC::@:[24969]...
0
votes
0answers
31 views

posgresql 11 can not start autovacuum

I want to use autovacuum for vacuum and analyze in PostgreSQL 11.5. I am trying to enable it on a dev server but I can't get it started. According to documentation : autovacuum = on ...
0
votes
0answers
81 views

PostgreSQL managed by AWS RDS - rdsadmin maxusedtransaction ID not shrinking

We are using AWS RDS Postgres. We reached the 200 million limit on one of the DB and triggered VACUUM FREEZE which took down the instance for roughly 40mins however the XID didn't shrink at all. We ...
0
votes
1answer
54 views

Autovacuum is not running even after configuring it on

I am using aurora-postgresql version 9.6.8. and I have one main instance , one writer and one reader replica. I am looking for below information: How I can check on a particular instance when ...
0
votes
1answer
24 views

Postgres 9.6.6 on Ubuntu 16.04, lots of errors

We're running perfsonar on a group of our servers, and while doing some maintenance work found that we get giant logfiles under /var/log/postgresql table bloat on the database of the perfsonar ...