diff options
| author | Fujii Masao <fujii@postgresql.org> | 2025-11-07 14:42:17 +0900 |
|---|---|---|
| committer | Fujii Masao <fujii@postgresql.org> | 2025-11-07 14:42:17 +0900 |
| commit | 6fba6cb05ddfb177ac1c4efa508707e879fb8bd3 (patch) | |
| tree | 31807861e09b163523cc9e255ed1533d25d51980 /doc/src | |
| parent | 5310fac6e0fcb1c7fcefb3446767673f9107328c (diff) | |
doc: Clarify units for io_combine_limit and io_max_combine_limit.
If these parameters are set without units, the values are interpreted
as blocks. This detail was previously missing from the documentation,
so this commit adds it.
Backpatch to v17 where io_combine_limit was added.
Author: Karina Litskevich <litskevichkarina@gmail.com>
Reviewed-by: Chao Li <lic@highgo.com>
Reviewed-by: Xuneng Zhou <xunengzhou@gmail.com>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/CACiT8iZCDkz1bNYQNQyvGhXWJExSnJULRTYT894u4-Ti7Yh6jw@mail.gmail.com
Backpatch-through: 17
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/config.sgml | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index d8a9f14b618..5fbe6c6794c 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -2697,6 +2697,8 @@ include_dir 'conf.d' This parameter can only be set in the <filename>postgresql.conf</filename> file or on the server command line. + If this value is specified without units, it is taken as blocks, + that is <symbol>BLCKSZ</symbol> bytes, typically 8kB. The maximum possible size depends on the operating system and block size, but is typically 1MB on Unix and 128kB on Windows. The default is 128kB. @@ -2716,6 +2718,8 @@ include_dir 'conf.d' higher than the <varname>io_max_combine_limit</varname> parameter, the lower value will silently be used instead, so both may need to be raised to increase the I/O size. + If this value is specified without units, it is taken as blocks, + that is <symbol>BLCKSZ</symbol> bytes, typically 8kB. The maximum possible size depends on the operating system and block size, but is typically 1MB on Unix and 128kB on Windows. The default is 128kB. |