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<a href="../c3ref/intro.html"><h2>SQLite C Interface</h2></a>
<h2>Memory Allocator Statistics</h2>
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<blockquote><pre>
sqlite3_int64 sqlite3_memory_used(void);
sqlite3_int64 sqlite3_memory_highwater(int resetFlag);
</pre></blockquote>
<p>
SQLite provides these two interfaces for reporting on the status
of the <a href="../c3ref/free.html">sqlite3_malloc()</a>, <a href="../c3ref/free.html">sqlite3_free()</a>, and <a href="../c3ref/free.html">sqlite3_realloc()</a>
routines, which form the built-in memory allocation subsystem.</p>
<p>The <a href="../c3ref/memory_highwater.html">sqlite3_memory_used()</a> routine returns the number of bytes
of memory currently outstanding (malloced but not freed).
The <a href="../c3ref/memory_highwater.html">sqlite3_memory_highwater()</a> routine returns the maximum
value of <a href="../c3ref/memory_highwater.html">sqlite3_memory_used()</a> since the high-water mark
was last reset. The values returned by <a href="../c3ref/memory_highwater.html">sqlite3_memory_used()</a> and
<a href="../c3ref/memory_highwater.html">sqlite3_memory_highwater()</a> include any overhead
added by SQLite in its implementation of <a href="../c3ref/free.html">sqlite3_malloc()</a>,
but not overhead added by the any underlying system library
routines that <a href="../c3ref/free.html">sqlite3_malloc()</a> may call.</p>
<p>The memory high-water mark is reset to the current value of
<a href="../c3ref/memory_highwater.html">sqlite3_memory_used()</a> if and only if the parameter to
<a href="../c3ref/memory_highwater.html">sqlite3_memory_highwater()</a> is true. The value returned
by <a href="../c3ref/memory_highwater.html">sqlite3_memory_highwater(1)</a> is the high-water mark
prior to the reset.
</p><p>See also lists of
<a href="../c3ref/objlist.html">Objects</a>,
<a href="../c3ref/constlist.html">Constants</a>, and
<a href="../c3ref/funclist.html">Functions</a>.</p>
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