Avoid using log_sys mutex when printing out show engine innodb status,

instead peek (maybe) old data.

1 files changed, 9 insertions, 0 deletions

diff --git a/storage/xtradb/include/buf0buf.h b/storage/xtradb/include/buf0buf.h
index 904822a7ce6..0f77404b1de 100644
--- a/storage/xtradb/include/buf0buf.h
+++ b/storage/xtradb/include/buf0buf.h
@@ -272,6 +272,15 @@ buf_pool_get_oldest_modification(void);
 /*==================================*/
 
 /********************************************************************//**
+Gets the smallest oldest_modification lsn for any page in the pool. Returns
+zero if all modified pages have been flushed to disk.
+@return oldest modification in pool, zero if none */
+UNIV_INTERN
+lsn_t
+buf_pool_get_oldest_modification_peek(void);
+/*=======================================*/
+
+/********************************************************************//**
 Allocates a buf_page_t descriptor. This function must succeed. In case
 of failure we assert in this function. */
 UNIV_INLINE