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| author | Nathan Bossart <nathan@postgresql.org> | 2024-10-18 10:20:15 -0500 |
|---|---|---|
| committer | Nathan Bossart <nathan@postgresql.org> | 2024-10-18 10:20:15 -0500 |
| commit | 0f4045814fd2e7200dfdf39b568140d8867c18d8 (patch) | |
| tree | 5611862c795e0177932d6ce1e943e211736bf398 | |
| parent | 53edc948580ff2d2fdbe1b34ed39aeffa61d6564 (diff) | |
| download | postgresql-0f4045814fd2e7200dfdf39b568140d8867c18d8.tar.gz postgresql-0f4045814fd2e7200dfdf39b568140d8867c18d8.zip | |
Adjust documentation for configuring Linux huge pages.
The present wording about viewing shared_memory_size_in_huge_pages
seems to suggest that the parameter cannot be viewed after startup
at all, whereas the intent is to make it clear that you can't use
"postgres -C" to view this parameter while the server is running.
This commit rephrases this section to remove the ambiguity.
Author: Seino Yuki
Reviewed-by: Michael Paquier, David G. Johnston, Fujii Masao
Discussion: https://postgr.es/m/420584fd274f9ec4f337da55ffb3b790%40oss.nttdata.com
Backpatch-through: 15
| -rw-r--r-- | doc/src/sgml/runtime.sgml | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml index 23f381d97cc..7590ea3e6a5 100644 --- a/doc/src/sgml/runtime.sgml +++ b/doc/src/sgml/runtime.sgml @@ -1445,11 +1445,10 @@ export PG_OOM_ADJUST_VALUE=0 with <varname>CONFIG_HUGETLBFS=y</varname> and <varname>CONFIG_HUGETLB_PAGE=y</varname>. You will also have to configure the operating system to provide enough huge pages of the desired size. - To determine the number of huge pages needed, use the - <command>postgres</command> command to see the value of - <xref linkend="guc-shared-memory-size-in-huge-pages"/>. Note that the - server must be shut down to view this runtime-computed parameter. - This might look like: + The runtime-computed parameter + <xref linkend="guc-shared-memory-size-in-huge-pages"/> reports the number + of huge pages required. This parameter can be viewed before starting the + server with a <command>postgres</command> command like: <programlisting> $ <userinput>postgres -D $PGDATA -C shared_memory_size_in_huge_pages</userinput> 3170 |