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+<!-- keywords: sqlite3_memory_highwater sqlite3_memory_used -->
+<div class=nosearch>
+<a href="intro.html"><h2>SQLite C Interface</h2></a>
+<h2>Memory Allocator Statistics</h2>
+</div>
+<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="objlist.html">Objects</a>,
+  <a href="constlist.html">Constants</a>, and
+  <a href="funclist.html">Functions</a>.</p>
+