merge with 3.23

BitKeeper/deleted/.del-global.h~e80d28157acfdcb5:
  Auto merged
Docs/manual.texi:
  Auto merged
client/client_priv.h:
  Auto merged
extra/resolveip.c:
  Auto merged
innobase/btr/btr0sea.c:
  Auto merged
innobase/os/os0file.c:
  Auto merged
innobase/rem/rem0cmp.c:
  Auto merged
innobase/row/row0mysql.c:
  Auto merged
innobase/srv/srv0srv.c:
  Auto merged
mysql-test/r/variables.result:
  Auto merged
mysql-test/t/variables.test:
  Auto merged
mysys/my_bitmap.c:
  Auto merged
sql/ha_innobase.cc:
  Auto merged
sql/ha_innobase.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_func.h:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/sql_do.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
client/mysqldump.c:
  Use local version in 4.0
configure.in:
  Use 4.0 code

1 files changed, 13 insertions, 1 deletions

diff --git a/innobase/srv/srv0srv.c b/innobase/srv/srv0srv.c
index 424bb8a7086..3f8763f91d6 100644
--- a/innobase/srv/srv0srv.c
+++ b/innobase/srv/srv0srv.c
@@ -2427,7 +2427,19 @@ loop:
 
 background_loop:
 	/* In this loop we run background operations when the server
-	is quiet */
+	is quiet and we also come here about once in 10 seconds */
+
+	srv_main_thread_op_info = "flushing buffer pool pages";
+
+	/* Flush a few oldest pages to make the checkpoint younger */
+
+	n_pages_flushed = buf_flush_batch(BUF_FLUSH_LIST, 10, ut_dulint_max);
+
+	srv_main_thread_op_info = "making checkpoint";
+
+	/* Make a new checkpoint about once in 10 seconds */
+
+	log_checkpoint(TRUE, FALSE);
 
 	srv_main_thread_op_info = (char *) "reserving kernel mutex";