Comment 3 for bug 991651

Seems only ru_maxrss makes any sense on Linux (BSD has other fields as well), so there isn't much except max RSS watermark.

>>bzr diff ./Percona-Server/sql/sql_profile.cc
=== modified file 'Percona-Server/sql/sql_profile.cc'

--- Percona-Server/sql/sql_profile.cc 2012-08-07 06:10:00 +0000
+++ Percona-Server/sql/sql_profile.cc 2012-08-30 15:29:31 +0000
@@ -77,6 +77,7 @@
   {"SOURCE_FUNCTION", 30, MYSQL_TYPE_STRING, 0, true, "Source_function", SKIP_OPEN_TABLE},
   {"SOURCE_FILE", 20, MYSQL_TYPE_STRING, 0, true, "Source_file", SKIP_OPEN_TABLE},
   {"SOURCE_LINE", 20, MYSQL_TYPE_LONG, 0, true, "Source_line", SKIP_OPEN_TABLE},
+ {"MAXIMUM RESIDENT SET SIZE", 20, MYSQL_TYPE_LONG, 0, true, "Maximum_Resident_Set_Size", SKIP_OPEN_TABLE},
   {NULL, 0, MYSQL_TYPE_STRING, 0, true, NULL, 0}
 };

@@ -103,6 +104,7 @@
     profile_options & PROFILE_SOURCE, /* Source_function */
     profile_options & PROFILE_SOURCE, /* Source_file */
     profile_options & PROFILE_SOURCE, /* Source_line */
+ profile_options & PROFILE_MEMORY, /* MEMORY_system */
   };

   ST_FIELD_INFO *field_info;
@@ -839,6 +841,13 @@
         table->field[17]->store(previous->line, true);
         table->field[17]->set_notnull();
       }
+#ifdef HAVE_GETRUSAGE
+ table->field[18]->store((uint32)(entry->rusage.ru_maxrss -
+ previous->rusage.ru_maxrss));
+ table->field[18]->set_notnull();
+#else
+ /* TODO: Add RSS info for non-BSD systems */
+#endif

       if (schema_table_store_record(thd_arg, table))
         DBUG_RETURN(1);