max_replication_slots

Specifies the maximum number of replication slots (see Section 26.2.6) that the server can support. The default is 10. This parameter can only be set at server start. Setting it to a lower value than the number of currently existing replication slots will prevent the server from starting. Also, wal_level must be set to replica or higher to allow replication slots to be used.

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

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boot val: 10
category: Replication / Sending Servers
context: postmaster
doc same as: Unknown
documented: true
enumvals: Unknown
extra desc: Unknown
lang: en
max val: 262143
metadata version: 18
min val: 0
name: max_replication_slots
short desc: Sets the maximum number of simultaneously defined replication slots.
source: pg-settings-source-snapshot
unit: Unknown
vartype: integer

Definition PG 18

Specifies the maximum number of replication slots (see Section 26.2.6) that the server can support. The default is 10. This parameter can only be set at server start. Setting it to a lower value than the number of currently existing replication slots will prevent the server from starting. Also, wal_level must be set to replica or higher to allow replication slots to be used.

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Complete source facts

doc html

<p>
         Specifies the maximum number of replication slots
         (see <a class="xref" href="/docs/18/warm-standby.html#STREAMING-REPLICATION-SLOTS" title="26.2.6. Replication Slots">Section 26.2.6</a>) that the server
         can support. The default is 10.  This parameter can only be set at
         server start.
         Setting it to a lower value than the number of currently
         existing replication slots will prevent the server from starting.
         Also, <code class="varname">wal_level</code> must be set
         to <code class="literal">replica</code> or higher to allow replication slots to
         be used.
        </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:daa9f6b22b70315cf9c475291f4d8a609ec5dea5de512c73476bd4a0a1c6eb77

Text language: en · wiki-repair-20261023:daa9f6b22b70315cf9c475291f4d8a609ec5dea5de512c73476bd4a0a1c6eb77