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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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Postgres n_tup_ins vs row count mismatch for a table which was never analyzed

I'm trying to figure out why no analyze job was ever performed on a table with more than 1 million rows. If I run the following query: select count(*) from variant I get 1,668,422 However when I retrieve the statistics on that same table: SELECT…
franDayz
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Tracking Postgres Autovacuums

We've been experimenting with tweaking the autovacuum thresholds on some of our larger tables, because otherwise they never run, but also build up 10s of thousands of dead tuples. Using a query I found somewhere on SO, looking at the…
shortstuffsushi
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Autovacuum Triggered for transaction wraparound for a table even with increased autovacuum_freeze_max_age at table level

I am having postgresql RDS and Aurora instances. On version 12, having a hot table that approached 200M trx id. To prevent it from hitting autovacuum for trx wraparound, I set the table autovacuum_freeze_max_age to 600M as I could not perform…
aakash muthuramalingam
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Is Postgres Autovacuum causing a read query to stuck at IOWait wait event?

I have encountered several occasions where my read query is stuck for hours and when checked on pg_stat_activity it has wait_event_type of IOWait. It also happens that every time this happens, there is an active autovacuum running on that table. The…
yonasstephen
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Intereat Vacuun cleaner Cybovac E31 for home automation

I search a way to control my CybovacE31 with a computer to integrate it into home automation system. I know that it is compatible with google home and Alexa but i don't find the protocol used. Do you have an idea how to do it? Thanks. My vacuum :…
Yvann Ponce
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How to fix "uncommitted xmin from before xid cutoff needs to be frozen, automatic vacuum of table "db.pg_catalog.pg_largeobject"

PostgreSQL Database error log generate this error all day and still continue error to next day [23523] ERROR: uncommitted xmin 53354897 from before xid cutoff 210760077 needs to be frozen [23523] CONTEXT: automatic vacuum of table…
Suphisara Subsurit
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autovacuum blocking index recreation

CentOS 7.9, postgres 9.6.20 We discovered what we believe to be a corrupt index on our postgres db. This is in production and pulling it down completely is not something we can do. We're working to recreate the index but autovacuum seems to be…
user3038068
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PostgreSQL failed with vacuum and autovacuum

Postgres v11.9 There are many errors on Postgres log like this: 2020-09-05 17:35:37 GMT [22464]: @: [6-1] ERROR: uncommitted xmin 636700836 from before xid cutoff 809126794 needs to be frozen 2020-09-05 17:35:37 GMT [22464]: @: [7-1] CONTEXT: …
Ivan Alex Khokhlov
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Tuning recommendations for Autovacuum

The AUTOVACUUM daemon is made up of multiple processes that reclaim storage by removing obsolete data or tuples from the database. It checks for tables that have a significant number of inserted, updated, or deleted records and vacuums these tables…
Olanrewaju
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How to setup Autovacuum monitoring for PostgreSql RDS instances

I need to setup Autovacuum monitoring for RDS instances. Need to make sure that Autovacuuming is running fine on table specific Autovacuuming. What would be there perfect way to setup monitoring. What all parameters should be the part of…
Chetan Dev Khanna
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Vacuumdb command on a Greenplum db is stuck

I'm trying to execute vacuumdb command from Java runtime and it is stuck forever(without throwing any error). The same when executed directly in the terminal is working properly. Command I used: /vacuumdb --verbose --analyze I have…
Aditya
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PG log : could not (re)acquire exclusive lock for truncate scan

PG logs are getting fill with 2019-03-08 07:01:20 PST LOG: automatic vacuum of table "hpdpidb.hpdpidb_app.dp_catalog_object_versession": could not (re)acquire exclusive lock for truncate scan Can anyone tell about this logging message? Why I am…
Neeraj Bansal
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Shrinking pg_toast on RDS instance

I have a Postgres 9.6 RDS instance and it is growing 1GB a day. We have made some optimizations to the relation related to the pg_toast but the pg_toast size is not changing. Autovacuum is on, but since autovacuum/VACUUM FREEZE do not reclaim space…
nael
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Postgres - autovacuum doesn't end - should I run a manual vacuum?

I have a table that had 80K writes per minute.. I did a change that reduce the load on this table (now it's 40K writes per minute). Currently I can see that there's an autovacuum that has been running for more than 3 days(!) and my table…
Yuval Kaufman
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Postgres: auto vacuum during a huge query

In a Postgres DB (9.4), we have a table with 35 millions rows. The data is fast static, it is first inserted with a COPY, then few fields are calculated. An example of calculation is: UPDATE mytable SET the_name = the_rank || '_' || the_number…
Rolintocour
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