s</A></DT>
  <DT><A href="#reference">Reference</A></DT>
</DL>

<A NAME="overview"></A>
<H2>Overview</H2>

<P>
    The function template <CODE>optimal_buffer_size</CODE> returns the size of the character buffer which is allocated for a Filter or Device by library streams, stream buffers and chains if no buffer size is explicitly specified.
</P>

<A NAME="headers"></A>
<H2>Headers</H2>

<DL>
  <DT><A CLASS="header" HREF="../../../../boost/iostreams/optimal_buffer_size.hpp"><CODE>&lt;boost/iostreams/optimal_b