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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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Autovacuum struggles with 2000 tables reaching autovacuum_freeze_max_age simultaneously

My goal is to keep autovacuum very responsive to current events, mainly so that tables are always properly analyzed. At the same time, I have huge batches of ~2000 tables that need wraparound-prevention vacuum. These batches delay autovacuum…
Peter
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Autovacuum is holding the ShareUpdateExclusiveLock for hours

On one of my Postgres server autovacuum worker is holding ShareUpdateExclusiveLock for hours. At the same time, one of the application programs is trying to detach a partition from the table. The application which is trying to detach the partition…
Mayank Kandari
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Postgresql : Maintaining the database and knowing more about relation/impact with each other Autovacuum , backend_xmin, datfrozenxid

I am newbie to Postgresql, My project is in financial transactions having a few tables with huge transaction data which will have frequent insert/update/delete on it. Initially when I started, came across an error that auto-vacuum is not working…
Anuya Varde
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How to revert the auto-vacuum settings for a table in postgresql?

I can update the autovacuum settings for a table using ALTER TABLE commands as follows: ALTER TABLE SET (autovacuum_vacuum_scale_factor = 0.02); But am not able to figure out (was not able to find in the docs) how these settings can…
Chayan Bansal
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Postgres autovacuum to prevent wraparound (difference between usual autovacuum)

I've got a Postgres 11 database. The database has logical dumps (REPLICA using streaming replication). Am I wright in thinking that if I've got tables in which information is inserted, but not modified, then usual autovacuum will not be…
Gerzzog
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Postgres query which shows when autovacuum (freeze) is launched

Help me please to write query which shows when on each table it is time to start autovacuum (freeze). I mean when 'vacuum_freeze_table_age' is on. I've got Postgres 11. I wrote query, but it seems not wright: SELECT age(c.relminmxid) -…
Gerzzog
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Postgres: Autovacuum and autovacuum wraparound. When does each start?

I've got 'autovacuum_freeze_max_age' which is 200 000 000 by default. And in theory I found a rule that autovacuum wraparound starts when: If age(relfrozenxid) > autovacuum_freeze_max_age But when then usual autovacuum is started? How can I count a…
Gerzzog
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Postgres PKey constraint violation - Old tuples are not getting Frozen

Pg 9.6. autovacuum on. Original problem was : we can't insert value because of pkey violation, but select doesn't return rows with same value. posstorage=# \d system_parameter Table "posstorage.system_parameter" Column | Type …
byx
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PostgreSQL 9.6 vacuum using 100% CPU

I am running PostgreSQL 9.6 on Centos 7. The database was migrated from a PostgreSQL 9.4 server that did not have the issue. With autovacuum on Postgres is using 100% of one core constantly (10% of total CPU). With autovacuum off it does not use any…
James
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RDS Postgres "canceling statement due to conflict with recovery"

I using 3 RDS Postgres Instance (1 master, 2 slave, version 13). And my Postgres config is using the default parameter group. max_standby_archive_delay = 30s max_standby_streaming_delay = 30s Recently, the following error occurs frequently. ERROR:…
prospective developer
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Is it possible to schedule Autovacuum for PostgreSql RDS instances for a particular time?

I have an application running on PostgreSQL which have high frequence of data migration (from backend) and record creation (and updation) due to which the resource are getting occupied in Autovaccuming. I know I can increase the threshold or factor…
shubham goel
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Postgresql autovacuum_vacuum

The disk size increases periodically, even though the dead tuple count is reduced by increasing the performance of Autovacuum. The amount of inserts is less than the number of dead tuples. Test Environment: Centos 7. postgesql 10.7 , memory 128G,…
chai
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Stop autovacuum on old partition

We're having some issues when autovacuum triggers on one of our large tables (~100Gb). Our ETL jobs only hit the last three partition of this table but, from my understanding, when autovacuum is triggered on a partition the whole table is vacuumed…
Mohamed BOUAKKAZ
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Postgresql dead tuples not being removed

We are using Postgresql 9.4 in our app and some table's dead tuples are not being properly removed. We have autovacuum on, with the default configuration. Here are some logs (this goes on the entire day): < 2021-11-30 00:31:30.703 EST >LOG: …
dssof
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Why does it run even with autovacuum turned off in Cloudsql on GCP?

I am using CloudSQL - postgresql12 version of GCP. We are currently entering billions of data, and we do not want the input to be interrupted in the middle. However, I set the autovacuum setting to off in the CloudSQL flag, but it seems to be done…
Hyungsik Jo
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