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pg_notification_queue_usage

Returns the fraction (0–1) of the asynchronous notification queue's maximum size that is currently occupied by notifications that are waiting to be processed. See LISTEN and NOTIFY for more information.

English manual coverage begins with PostgreSQL 7.1. Source history and runtime observations have their own recorded version boundaries.

Reading PG 18·Select a recorded version

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系统信息函数和操作符
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functions-info.html
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Definition PG 18

Returns the fraction (0–1) of the asynchronous notification queue's maximum size that is currently occupied by notifications that are waiting to be processed. See LISTEN and NOTIFY for more information.

Signatures and overloads

pg_notification_queue_usage () → double precision → double precision
Returns the fraction (0–1) of the asynchronous notification queue's maximum size that is currently occupied by notifications that are waiting to be processed. See LISTEN and NOTIFY for more information.

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Complete source facts

documentation revision

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Source references

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · wiki-repair-20261023:59691bc203e3b649542234f6b230e9dafb2a0f046e7b7b3e7c0d15f3433edb1e

Text language: en · wiki-repair-20261023:59691bc203e3b649542234f6b230e9dafb2a0f046e7b7b3e7c0d15f3433edb1e