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doc: Improve description of min_dynamic_shared_memory 

While on it, fix one oversight in 90fbf7c, that introduced a reference
to an incorrect value for the compression level of pg_dump.

Author: Justin Pryzby
Reviewed-by: Thomas Munro, Michael Paquier
Discussion: https://postgr.es/m/CA+hUKGJRTLWWPcQfjm_xaOk98M8aROK903X92O0x-4vLJPWrrA@mail.gmail.com
This commit is contained in:
Michael Paquier 2020-12-29 16:49:14 +09:00
parent 3995c42498
commit 1b3433e25f
2 changed files with 2 additions and 3 deletions
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4
doc/src/sgml/config.sgml
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@ -1939,13 +1939,13 @@ include_dir 'conf.d'
<listitem> <listitem>
<para> <para>
Specifies the amount of memory that should be allocated at server Specifies the amount of memory that should be allocated at server
startup time for use by parallel queries. When this memory region is startup for use by parallel queries. When this memory region is
insufficient or exhausted by concurrent queries, new parallel queries insufficient or exhausted by concurrent queries, new parallel queries
try to allocate extra shared memory temporarily from the operating try to allocate extra shared memory temporarily from the operating
system using the method configured with system using the method configured with
<varname>dynamic_shared_memory_type</varname>, which may be slower due <varname>dynamic_shared_memory_type</varname>, which may be slower due
to memory management overheads. Memory that is allocated at startup to memory management overheads. Memory that is allocated at startup
time with <varname>min_dynamic_shared_memory</varname> is affected by with <varname>min_dynamic_shared_memory</varname> is affected by
the <varname>huge_pages</varname> setting on operating systems where the <varname>huge_pages</varname> setting on operating systems where
that is supported, and may be more likely to benefit from larger pages that is supported, and may be more likely to benefit from larger pages
on operating systems where that is managed automatically. on operating systems where that is managed automatically.

1
src/bin/pg_dump/pg_backup_archiver.h
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@ -332,7 +332,6 @@ struct _archiveHandle
int compression; /*--------- int compression; /*---------
* Compression requested on open(). * Compression requested on open().
* Possible values for compression: * Possible values for compression:
* -2 ZSTD_COMPRESSION
* -1 Z_DEFAULT_COMPRESSION * -1 Z_DEFAULT_COMPRESSION
* 0 COMPRESSION_NONE * 0 COMPRESSION_NONE
* 1-9 levels for gzip compression * 1-9 levels for gzip compression