<productname>PostgreSQL</productname> is started by including the module name in
<varname>shared_preload_libraries</varname>. A module wishing to run a background
worker can register it by calling
- <function>RegisterBackgroundWorker(<type>BackgroundWorker *worker</type>)</function>
- from its <function>_PG_init()</function>. Background workers can also be started
- after the system is up and running by calling the function
- <function>RegisterDynamicBackgroundWorker(<type>BackgroundWorker
- *worker, BackgroundWorkerHandle **handle</type>)</function>. Unlike
- <function>RegisterBackgroundWorker</function>, which can only be called from within
- the postmaster, <function>RegisterDynamicBackgroundWorker</function> must be
- called from a regular backend or another background worker.
+ <function>RegisterBackgroundWorker(<type>BackgroundWorker</type>
+ *<parameter>worker</parameter>)</function>
+ from its <function>_PG_init()</function> function.
+ Background workers can also be started
+ after the system is up and running by calling
+ <function>RegisterDynamicBackgroundWorker(<type>BackgroundWorker</type>
+ *<parameter>worker</parameter>, <type>BackgroundWorkerHandle</type>
+ **<parameter>handle</parameter>)</function>. Unlike
+ <function>RegisterBackgroundWorker</function>, which can only be called from
+ within the postmaster process,
+ <function>RegisterDynamicBackgroundWorker</function> must be called
+ from a regular backend or another background worker.
</para>
<para>
-- a message can be in one or more <quote>sections</quote>
CREATE TABLE message (mid INT PRIMARY KEY, sections INT[], ...);
--- create specialized index with sigature length of 32 bytes
+-- create specialized index with signature length of 32 bytes
CREATE INDEX message_rdtree_idx ON message USING GIST (sections gist__int_ops(siglen=32));
-- select messages in section 1 OR 2 - OVERLAP operator
},
{
{"autovacuum_vacuum_insert_threshold", PGC_SIGHUP, AUTOVACUUM,
- gettext_noop("Minimum number of tuple inserts prior to vacuum, or -1 to disable insert vacuums"),
+ gettext_noop("Minimum number of tuple inserts prior to vacuum, or -1 to disable insert vacuums."),
NULL
},
&autovacuum_vac_ins_thresh,