autovacuum_worker_slots

Specifies the number of backend slots to reserve for autovacuum worker processes. The default is typically 16 slots, but might be less if your kernel settings will not support it (as determined during initdb). This parameter can only be set at server start. When changing this value, consider also adjusting autovacuum_max_workers.

English manual coverage begins with PostgreSQL 7.4. Source history and runtime observations have their own recorded version boundaries.

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18 19 20

boot val: 16
category: Vacuuming / Automatic Vacuuming
context: postmaster
doc same as: Unknown
documented: true
enumvals: Unknown
extra desc: Unknown
lang: en
max val: 262143
metadata version: 18
min val: 1
name: autovacuum_worker_slots
short desc: Sets the number of backend slots to allocate for autovacuum workers.
source: pg-settings-source-snapshot
unit: Unknown
vartype: integer

Definition PG 18

When changing this value, consider also adjusting autovacuum_max_workers.

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Complete source facts

doc html

<p>
         Specifies the number of backend slots to reserve for autovacuum worker
         processes.  The default is typically 16 slots, but might be less if
         your kernel settings will not support it (as determined during initdb).
         This parameter can only be set at server start.
        </p><p>
         When changing this value, consider also adjusting
         <a class="xref" href="/docs/18/runtime-config-vacuum.html#GUC-AUTOVACUUM-MAX-WORKERS">autovacuum_max_workers</a>.
        </p>

documentation revision

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Source references

Original manual reference

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · wiki-repair-20261023:a80c1f362cb9e1479d80ddf5f3ea34ff5d46db1fdbe13405b6e2c12b7e5c616d

Text language: en · wiki-repair-20261023:a80c1f362cb9e1479d80ddf5f3ea34ff5d46db1fdbe13405b6e2c12b7e5c616d