[#BloombergLP-bdls-FdStreamBuf_FileHandler-pageSize]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdls.adoc[bdls]::xref:BloombergLP/bdls/FdStreamBuf_FileHandler.adoc[FdStreamBuf_FileHandler]::pageSize
:relfileprefix: ../../../
:mrdocs:

Return the operating system's page size.

== Synopsis

Declared in `<bdls_fdstreambuf.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
size_t
pageSize();
----


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