Bug#12920 - key_read_requests counter appears to re-set

Enlarged the counter variables to ulonglong.

include/my_sys.h

@@ -222,8 +222,8 @@ extern char *get_charsets_dir(char *buf);
 
 
 /* statistics */
-extern ulong	_my_cache_w_requests,_my_cache_write,_my_cache_r_requests,
-		_my_cache_read;
+extern ulonglong    _my_cache_w_requests, _my_cache_write;
+extern ulonglong    _my_cache_r_requests, _my_cache_read;
 extern ulong	_my_blocks_used,_my_blocks_changed;
 extern uint	key_cache_block_size;
 extern ulong	my_file_opened,my_stream_opened, my_tmp_file_created;

myisam/mi_test2.c

@@ -812,12 +812,14 @@ int main(int argc, char *argv[])
       puts("blobs used");
     printf("key cache status: \n\
 blocks used:%10lu\n\
+not flushed:%10lu\n\
 w_requests: %10lu\n\
 writes:     %10lu\n\
 r_requests: %10lu\n\
 reads:      %10lu\n",
-	   _my_blocks_used,_my_cache_w_requests, _my_cache_write,
-	   _my_cache_r_requests,_my_cache_read);
+           _my_blocks_used, _my_blocks_changed,
+           (ulong) _my_cache_w_requests, (ulong) _my_cache_write,
+           (ulong) _my_cache_r_requests, (ulong) _my_cache_read);
   }
   end_key_cache();
   if (blob_buffer)

mysys/mf_keycache.c

@@ -62,8 +62,8 @@ static int	_my_disk_blocks;
 static uint	_my_disk_blocks_used, _my_hash_blocks;
 static uint	key_cache_shift;
 ulong		_my_blocks_used,_my_blocks_changed;
-ulong		_my_cache_w_requests,_my_cache_write,_my_cache_r_requests,
-		_my_cache_read;
+ulonglong       _my_cache_w_requests, _my_cache_write;
+ulonglong       _my_cache_r_requests, _my_cache_read;
 uint		key_cache_block_size=DEFAULT_KEYCACHE_BLOCK_SIZE;
 static byte	HUGE_PTR *_my_block_mem;
 static SEC_LINK *changed_blocks[CHANGED_BLOCKS_HASH];
@@ -192,9 +192,11 @@ void end_key_cache(void)
   key_cache_inited=0;
   _my_hash_blocks=_my_blocks_used=0;
   DBUG_PRINT("status",
-	     ("used: %d  changed: %d  w_requests: %ld  writes: %ld  r_requests: %ld  reads: %ld",
-	      _my_blocks_used,_my_blocks_changed,_my_cache_w_requests,
-	      _my_cache_write,_my_cache_r_requests,_my_cache_read));
+	     ("used: %d  changed: %d  w_requests: %lu  writes: %lu  "
+              "r_requests: %lu  reads: %lu",
+	      _my_blocks_used, _my_blocks_changed,
+              (ulong) _my_cache_w_requests, (ulong) _my_cache_write,
+              (ulong) _my_cache_r_requests, (ulong) _my_cache_read));
   DBUG_VOID_RETURN;
 } /* end_key_cache */
 

sql/mysqld.cc

@@ -4532,10 +4532,10 @@ struct show_var_st status_vars[]= {
   {"Handler_update",           (char*) &ha_update_count,        SHOW_LONG},
   {"Handler_write",            (char*) &ha_write_count,         SHOW_LONG},
   {"Key_blocks_used",          (char*) &_my_blocks_used,        SHOW_LONG_CONST},
-  {"Key_read_requests",        (char*) &_my_cache_r_requests,   SHOW_LONG},
-  {"Key_reads",                (char*) &_my_cache_read,         SHOW_LONG},
-  {"Key_write_requests",       (char*) &_my_cache_w_requests,   SHOW_LONG},
-  {"Key_writes",               (char*) &_my_cache_write,        SHOW_LONG},
+  {"Key_read_requests",        (char*) &_my_cache_r_requests,   SHOW_LONGLONG},
+  {"Key_reads",                (char*) &_my_cache_read,         SHOW_LONGLONG},
+  {"Key_write_requests",       (char*) &_my_cache_w_requests,   SHOW_LONGLONG},
+  {"Key_writes",               (char*) &_my_cache_write,        SHOW_LONGLONG},
   {"Max_used_connections",     (char*) &max_used_connections,   SHOW_LONG},
   {"Not_flushed_delayed_rows", (char*) &delayed_rows_in_use,    SHOW_LONG_CONST},
   {"Not_flushed_key_blocks",   (char*) &_my_blocks_changed,     SHOW_LONG_CONST},

sql/sql_test.cc

@@ -195,6 +195,8 @@ TEST_join(JOIN *join)
 void mysql_print_status(THD *thd)
 {
   char current_dir[FN_REFLEN];
+  char llbuff[22];
+
   printf("\nStatus information:\n\n");
   my_getwd(current_dir, sizeof(current_dir),MYF(0));
   printf("Current dir: %s\n", current_dir);
@@ -214,13 +216,12 @@ void mysql_print_status(THD *thd)
   pthread_mutex_lock(&THR_LOCK_keycache);
   printf("key_cache status:\n\
 blocks used:%10lu\n\
-not flushed:%10lu\n\
-w_requests: %10lu\n\
-writes:     %10lu\n\
-r_requests: %10lu\n\
-reads:      %10lu\n",
-	 _my_blocks_used,_my_blocks_changed,_my_cache_w_requests,
-	 _my_cache_write,_my_cache_r_requests,_my_cache_read);
+not flushed:%10lu\n",
+         _my_blocks_used, _my_blocks_changed);
+  printf("w_requests: %10s\n", llstr(_my_cache_w_requests, llbuff));
+  printf("writes:     %10s\n", llstr(_my_cache_write,      llbuff));
+  printf("r_requests: %10s\n", llstr(_my_cache_r_requests, llbuff));
+  printf("reads:      %10s\n", llstr(_my_cache_read,       llbuff));
   pthread_mutex_unlock(&THR_LOCK_keycache);
 
   if (thd)