Merge 10.5 into 10.6

mysql-test/suite/encryption/r/innochecksum,debug.rdiff

+@@ -30,6 +30,9 @@
+ # Space ID mismatch
+ # Restore the original tables
+ # Corrupt FIL_DATA+10 (data)
++# FOUND 1 is expected for both.
++FOUND 1 /InnoDB: Crash recovery is broken due to insufficient innodb_log_file_size; last checkpoint LSN=\d+, current LSN=\d+\. Shutdown is in progress\..*InnoDB: Crash recovery was broken.*/ in mysqld.1.err
++FOUND 1 /InnoDB: Crash recovery was broken/ in mysqld.1.err
+ # Run innochecksum on t2
+ # Run innochecksum on t3
+ # Run innochecksum on t6

mysql-test/suite/encryption/t/innochecksum.test

@@ -9,6 +9,7 @@
 -- source include/have_file_key_management_plugin.inc
 -- source include/innodb_page_size_small.inc
 -- source include/innodb_checksum_algorithm.inc
+-- source include/maybe_debug.inc
 
 if (!$INNOCHECKSUM) {
   --echo Need innochecksum binary
@@ -18,6 +19,10 @@ if (!$INNOCHECKSUM) {
 --disable_query_log
 # This may be triggered on a slow system or one that lacks native AIO.
 call mtr.add_suppression("InnoDB: Trying to delete tablespace.*pending operations");
+if ($have_debug) {
+SET GLOBAL DEBUG_DBUG='+d,ib_log_checkpoint_avoid_hard';
+call mtr.add_suppression("InnoDB: Crash recovery is broken due to insufficient innodb_log_file_size");
+}
 --enable_query_log
 
 let $checksum_algorithm = `SELECT @@innodb_checksum_algorithm`;
@@ -259,6 +264,15 @@ print FILE pack("H*", "c00lcafedeadb017");
 close FILE or die "close";
 EOF
 
+if ($have_debug) {
+--let SEARCH_FILE= $MYSQLTEST_VARDIR/log/mysqld.1.err
+--let SEARCH_PATTERN= InnoDB: Crash recovery is broken due to insufficient innodb_log_file_size; last checkpoint LSN=\\d+, current LSN=\\d+\\. Shutdown is in progress\\..*InnoDB: Crash recovery was broken.*
+--echo # FOUND 1 is expected for both.
+--source include/search_pattern_in_file.inc
+--let SEARCH_PATTERN= InnoDB: Crash recovery was broken
+--source include/search_pattern_in_file.inc
+}
+
 -- disable_result_log
 --error 1
 --exec $INNOCHECKSUM $t1_IBD

mysys/my_gethwaddr.c

@@ -116,7 +116,7 @@ my_bool my_gethwaddr(uchar *to)
     uint i;
     for (i= 0; res && i < ifc.ifc_len / sizeof(ifr[0]); i++)
     {
-#if !defined(_AIX) || !defined(__linux__)
+#if defined(_AIX) || defined(__linux__)
 #if defined(__linux__)
 #define HWADDR_DATA ifr[i].ifr_hwaddr.sa_data
 #else

storage/innobase/CMakeLists.txt

@@ -280,8 +280,7 @@ SET(INNOBASE_SOURCES
 	include/handler0alter.h
 	include/hash0hash.h
 	include/ibuf0ibuf.h
-	include/ibuf0ibuf.inl/
-	include/ibuf0types.h
+	include/ibuf0ibuf.inl
 	include/lock0iter.h
 	include/lock0lock.h
 	include/lock0lock.inl

storage/innobase/buf/buf0flu.cc

@@ -1886,6 +1886,7 @@ ATTRIBUTE_COLD void buf_flush_wait_flushed(lsn_t sync_lsn)
     write out before we can advance the checkpoint. */
     if (sync_lsn > log_sys.get_flushed_lsn())
       log_write_up_to(sync_lsn, true);
+    DBUG_EXECUTE_IF("ib_log_checkpoint_avoid_hard", return;);
     log_checkpoint();
   }
 }
@@ -1901,6 +1902,8 @@ ATTRIBUTE_COLD void buf_flush_ahead(lsn_t lsn, bool furious)
   if (recv_recovery_is_on())
     recv_sys.apply(true);
 
+  DBUG_EXECUTE_IF("ib_log_checkpoint_avoid_hard", return;);
+
   Atomic_relaxed<lsn_t> &limit= furious
     ? buf_flush_sync_lsn : buf_flush_async_lsn;
 
@@ -2253,6 +2256,7 @@ static void buf_flush_page_cleaner()
       buf_pool.page_cleaner_set_idle(true);
 
       DBUG_EXECUTE_IF("ib_log_checkpoint_avoid", continue;);
+      DBUG_EXECUTE_IF("ib_log_checkpoint_avoid_hard", continue;);
 
       mysql_mutex_unlock(&buf_pool.flush_list_mutex);
 
@@ -2336,6 +2340,7 @@ static void buf_flush_page_cleaner()
         here should not affect correctness, because log_free_check()
         should still be invoking checkpoints when needed. */
         DBUG_EXECUTE_IF("ib_log_checkpoint_avoid", goto next;);
+        DBUG_EXECUTE_IF("ib_log_checkpoint_avoid_hard", goto next;);
 
         if (!recv_recovery_is_on() && srv_operation == SRV_OPERATION_NORMAL)
           log_checkpoint();

storage/innobase/ibuf/ibuf0ibuf.cc

@@ -2385,16 +2385,11 @@ static void ibuf_read_merge_pages(const uint32_t* space_ids,
 #endif
 }
 
-/*********************************************************************//**
-Contracts insert buffer trees by reading pages to the buffer pool.
+/** Contract the change buffer by reading pages to the buffer pool.
 @return a lower limit for the combined size in bytes of entries which
-will be merged from ibuf trees to the pages read, 0 if ibuf is
-empty */
-static
-ulint
-ibuf_merge_pages(
-/*=============*/
-	ulint*	n_pages)	/*!< out: number of pages to which merged */
+will be merged from ibuf trees to the pages read
+@retval 0 if ibuf.empty */
+ulint ibuf_contract()
 {
 	mtr_t		mtr;
 	btr_pcur_t	pcur;
@@ -2402,8 +2397,6 @@ ibuf_merge_pages(
 	uint32_t	page_nos[IBUF_MAX_N_PAGES_MERGED];
 	uint32_t	space_ids[IBUF_MAX_N_PAGES_MERGED];
 
-	*n_pages = 0;
-
 	ibuf_mtr_start(&mtr);
 
 	/* Open a cursor to a randomly chosen leaf of the tree, at a random
@@ -2436,13 +2429,14 @@ ibuf_merge_pages(
 		return(0);
 	}
 
+	ulint n_pages = 0;
 	sum_sizes = ibuf_get_merge_page_nos(TRUE,
 					    btr_pcur_get_rec(&pcur), &mtr,
 					    space_ids,
-					    page_nos, n_pages);
+					    page_nos, &n_pages);
 	ibuf_mtr_commit(&mtr);
 
-	ibuf_read_merge_pages(space_ids, page_nos, *n_pages);
+	ibuf_read_merge_pages(space_ids, page_nos, n_pages);
 
 	return(sum_sizes + 1);
 }
@@ -2514,73 +2508,6 @@ ibuf_merge_space(
 	return(n_pages);
 }
 
-/** Contract the change buffer by reading pages to the buffer pool.
-@param[out]	n_pages		number of pages merged
-@param[in]	sync		whether the caller waits for
-the issued reads to complete
-@return a lower limit for the combined size in bytes of entries which
-will be merged from ibuf trees to the pages read, 0 if ibuf is
-empty */
-MY_ATTRIBUTE((warn_unused_result))
-static ulint ibuf_merge(ulint* n_pages)
-{
-	*n_pages = 0;
-
-	/* We perform a dirty read of ibuf.empty, without latching
-	the insert buffer root page. We trust this dirty read except
-	when a slow shutdown is being executed. During a slow
-	shutdown, the insert buffer merge must be completed. */
-
-	if (ibuf.empty && srv_shutdown_state <= SRV_SHUTDOWN_INITIATED) {
-		return(0);
-#if defined UNIV_DEBUG || defined UNIV_IBUF_DEBUG
-	} else if (ibuf_debug) {
-		return(0);
-#endif /* UNIV_DEBUG || UNIV_IBUF_DEBUG */
-	} else {
-		return ibuf_merge_pages(n_pages);
-	}
-}
-
-/** Contract the change buffer by reading pages to the buffer pool.
-@return a lower limit for the combined size in bytes of entries which
-will be merged from ibuf trees to the pages read, 0 if ibuf is empty */
-static ulint ibuf_contract()
-{
-	ulint n_pages;
-	return ibuf_merge_pages(&n_pages);
-}
-
-/** Contract the change buffer by reading pages to the buffer pool.
-@return a lower limit for the combined size in bytes of entries which
-will be merged from ibuf trees to the pages read, 0 if ibuf is
-empty */
-ulint ibuf_merge_all()
-{
-#if defined UNIV_DEBUG || defined UNIV_IBUF_DEBUG
-	if (ibuf_debug) {
-		return(0);
-	}
-#endif /* UNIV_DEBUG || UNIV_IBUF_DEBUG */
-
-	ulint	sum_bytes	= 0;
-	ulint	n_pages = srv_io_capacity;
-
-	for (ulint sum_pages = 0; sum_pages < n_pages; ) {
-		log_free_check();
-		ulint n_pag2;
-		ulint n_bytes = ibuf_merge(&n_pag2);
-
-		if (n_bytes == 0) {
-			break;
-		}
-
-		sum_bytes += n_bytes;
-	}
-
-	return sum_bytes;
-}
-
 /*********************************************************************//**
 Contract insert buffer trees after insert if they are too big. */
 UNIV_INLINE
@@ -2590,13 +2517,7 @@ ibuf_contract_after_insert(
 	ulint	entry_size)	/*!< in: size of a record which was inserted
 				into an ibuf tree */
 {
-	/* Perform dirty reads of ibuf.size and ibuf.max_size, to
-	reduce ibuf_mutex contention. ibuf.max_size remains constant
-	after ibuf_init_at_db_start(), but ibuf.size should be
-	protected by ibuf_mutex. Given that ibuf.size fits in a
-	machine word, this should be OK; at worst we are doing some
-	excessive ibuf_contract() or occasionally skipping a
-	ibuf_contract(). */
+	/* dirty comparison, to avoid contention on ibuf_mutex */
 	if (ibuf.size < ibuf.max_size) {
 		return;
 	}
@@ -3224,16 +3145,17 @@ ibuf_insert_low(
 
 	do_merge = FALSE;
 
-	/* Perform dirty reads of ibuf.size and ibuf.max_size, to
-	reduce ibuf_mutex contention. Given that ibuf.max_size and
-	ibuf.size fit in a machine word, this should be OK; at worst
-	we are doing some excessive ibuf_contract() or occasionally
+	/* Perform dirty comparison of ibuf.max_size and ibuf.size to
+	reduce ibuf_mutex contention. This should be OK; at worst we
+	are doing some excessive ibuf_contract() or occasionally
 	skipping an ibuf_contract(). */
-	if (ibuf.max_size == 0) {
+	const ulint max_size = ibuf.max_size;
+
+	if (max_size == 0) {
 		return(DB_STRONG_FAIL);
 	}
 
-	if (ibuf.size >= ibuf.max_size + IBUF_CONTRACT_DO_NOT_INSERT) {
+	if (ibuf.size >= max_size + IBUF_CONTRACT_DO_NOT_INSERT) {
 		/* Insert buffer is now too big, contract it but do not try
 		to insert */
 
@@ -4576,7 +4498,7 @@ ibuf_print(
 	fprintf(file,
 		"Ibuf: size " ULINTPF ", free list len " ULINTPF ","
 		" seg size " ULINTPF ", " ULINTPF " merges\n",
-		ibuf.size,
+		ulint{ibuf.size},
 		ibuf.free_list_len,
 		ibuf.seg_size,
 		ulint{ibuf.n_merges});

storage/innobase/include/ibuf0ibuf.h

@@ -30,7 +30,6 @@ Created 7/19/1997 Heikki Tuuri
 #include "mtr0mtr.h"
 #include "dict0mem.h"
 #include "fsp0fsp.h"
-#include "ibuf0types.h"
 
 /** Default value for maximum on-disk size of change buffer in terms
 of percentage of the buffer pool. */
@@ -61,6 +60,37 @@ enum ibuf_use_t {
 /** Operations that can currently be buffered. */
 extern ulong		innodb_change_buffering;
 
+/** Insert buffer struct */
+struct ibuf_t{
+	Atomic_relaxed<ulint> size;	/*!< current size of the ibuf index
+					tree, in pages */
+	Atomic_relaxed<ulint> max_size;	/*!< recommended maximum size of the
+					ibuf index tree, in pages */
+	ulint		seg_size;	/*!< allocated pages of the file
+					segment containing ibuf header and
+					tree */
+	bool		empty;		/*!< Protected by the page
+					latch of the root page of the
+					insert buffer tree
+					(FSP_IBUF_TREE_ROOT_PAGE_NO). true
+					if and only if the insert
+					buffer tree is empty. */
+	ulint		free_list_len;	/*!< length of the free list */
+	ulint		height;		/*!< tree height */
+	dict_index_t*	index;		/*!< insert buffer index */
+
+	/** number of pages merged */
+	Atomic_counter<ulint> n_merges;
+	Atomic_counter<ulint> n_merged_ops[IBUF_OP_COUNT];
+					/*!< number of operations of each type
+					merged to index pages */
+	Atomic_counter<ulint> n_discarded_ops[IBUF_OP_COUNT];
+					/*!< number of operations of each type
+					discarded without merging due to the
+					tablespace being deleted or the
+					index being dropped */
+};
+
 /** The insert buffer control structure */
 extern ibuf_t		ibuf;
 
@@ -339,9 +369,9 @@ void ibuf_delete_for_discarded_space(ulint space);
 
 /** Contract the change buffer by reading pages to the buffer pool.
 @return a lower limit for the combined size in bytes of entries which
-will be merged from ibuf trees to the pages read, 0 if ibuf is
-empty */
-ulint ibuf_merge_all();
+will be merged from ibuf trees to the pages read
+@retval 0 if ibuf.empty */
+ulint ibuf_contract();
 
 /** Contracts insert buffer trees by reading pages referring to space_id
 to the buffer pool.

storage/innobase/include/ibuf0ibuf.inl

@@ -64,37 +64,6 @@ ibuf_mtr_commit(
 	mtr_commit(mtr);
 }
 
-/** Insert buffer struct */
-struct ibuf_t{
-	ulint		size;		/*!< current size of the ibuf index
-					tree, in pages */
-	ulint		max_size;	/*!< recommended maximum size of the
-					ibuf index tree, in pages */
-	ulint		seg_size;	/*!< allocated pages of the file
-					segment containing ibuf header and
-					tree */
-	bool		empty;		/*!< Protected by the page
-					latch of the root page of the
-					insert buffer tree
-					(FSP_IBUF_TREE_ROOT_PAGE_NO). true
-					if and only if the insert
-					buffer tree is empty. */
-	ulint		free_list_len;	/*!< length of the free list */
-	ulint		height;		/*!< tree height */
-	dict_index_t*	index;		/*!< insert buffer index */
-
-	/** number of pages merged */
-	Atomic_counter<ulint> n_merges;
-	Atomic_counter<ulint> n_merged_ops[IBUF_OP_COUNT];
-					/*!< number of operations of each type
-					merged to index pages */
-	Atomic_counter<ulint> n_discarded_ops[IBUF_OP_COUNT];
-					/*!< number of operations of each type
-					discarded without merging due to the
-					tablespace being deleted or the
-					index being dropped */
-};
-
 /************************************************************************//**
 Sets the free bit of the page in the ibuf bitmap. This is done in a separate
 mini-transaction, hence this operation does not restrict further work to only

storage/innobase/include/ibuf0types.h

-/*****************************************************************************
-
-Copyright (c) 1997, 2009, Oracle and/or its affiliates. All Rights Reserved.
-
-This program is free software; you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free Software
-Foundation; version 2 of the License.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along with
-this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
-
-*****************************************************************************/
-
-/**************************************************//**
-@file include/ibuf0types.h
-Insert buffer global types
-
-Created 7/29/1997 Heikki Tuuri
-*******************************************************/
-
-#ifndef ibuf0types_h
-#define ibuf0types_h
-
-struct ibuf_t;
-
-#endif

storage/innobase/include/log0log.h

@@ -2,7 +2,7 @@
 
 Copyright (c) 1995, 2017, Oracle and/or its affiliates. All rights reserved.
 Copyright (c) 2009, Google Inc.
-Copyright (c) 2017, 2021, MariaDB Corporation.
+Copyright (c) 2017, 2022, MariaDB Corporation.
 
 Portions of this file contain modifications contributed and copyrighted by
 Google, Inc. Those modifications are gratefully acknowledged and are described
@@ -466,6 +466,11 @@ struct log_t{
   size_t buf_free;
   /** recommended maximum size of buf, after which the buffer is flushed */
   size_t max_buf_free;
+
+  /** Log sequence number when a log file overwrite (broken crash recovery)
+  was noticed. Protected by mutex. */
+  lsn_t overwrite_warned;
+
   /** mutex to serialize access to the flush list when we are putting
   dirty blocks in the list. The idea behind this mutex is to be able
   to release log_sys.mutex during mtr_commit and still ensure that

storage/innobase/log/log0log.cc

@@ -52,6 +52,7 @@ Created 12/9/1995 Heikki Tuuri
 #include "srv0mon.h"
 #include "buf0dump.h"
 #include "log0sync.h"
+#include "log.h"
 
 /*
 General philosophy of InnoDB redo-logs:
@@ -988,11 +989,20 @@ ATTRIBUTE_COLD void log_write_checkpoint_info(lsn_t end_lsn)
 
 	DBUG_PRINT("ib_log", ("checkpoint ended at " LSN_PF
 			      ", flushed to " LSN_PF,
-			      lsn_t{log_sys.last_checkpoint_lsn},
+			      log_sys.next_checkpoint_lsn,
 			      log_sys.get_flushed_lsn()));
 
 	MONITOR_INC(MONITOR_NUM_CHECKPOINT);
 
+	if (log_sys.overwrite_warned) {
+		sql_print_information("InnoDB: Crash recovery was broken "
+				      "between LSN=" LSN_PF
+				      " and checkpoint LSN=" LSN_PF ".",
+				      log_sys.overwrite_warned,
+				      log_sys.next_checkpoint_lsn);
+		log_sys.overwrite_warned = 0;
+        }
+
 	mysql_mutex_unlock(&log_sys.mutex);
 }
 
@@ -1020,10 +1030,15 @@ ATTRIBUTE_COLD static void log_checkpoint_margin()
     const lsn_t sync_lsn= checkpoint + log_sys.max_checkpoint_age;
     if (lsn <= sync_lsn)
     {
+#ifndef DBUG_OFF
+    skip_checkpoint:
+#endif
       log_sys.set_check_flush_or_checkpoint(false);
       goto func_exit;
     }
 
+    DBUG_EXECUTE_IF("ib_log_checkpoint_avoid_hard", goto skip_checkpoint;);
+
     mysql_mutex_unlock(&log_sys.mutex);
 
     /* We must wait to prevent the tail of the log overwriting the head. */
@@ -1120,13 +1135,9 @@ ATTRIBUTE_COLD void logs_empty_and_mark_files_at_shutdown()
 	}
 
 	/* We need these threads to stop early in shutdown. */
-	const char* thread_name;
-
-   if (srv_fast_shutdown != 2 && trx_rollback_is_active) {
-		thread_name = "rollback of recovered transactions";
-	} else {
-		thread_name = NULL;
-	}
+	const char* thread_name = srv_fast_shutdown != 2
+		&& trx_rollback_is_active
+		? "rollback of recovered transactions" : nullptr;
 
 	if (thread_name) {
 		ut_ad(!srv_read_only_mode);

storage/innobase/mtr/mtr0mtr.cc

@@ -24,18 +24,19 @@ Mini-transaction buffer
 Created 11/26/1995 Heikki Tuuri
 *******************************************************/
 
-#include "mtr0mtr.h"
+#include "mtr0log.h"
 
 #include "buf0buf.h"
 #include "buf0flu.h"
 #include "fsp0sysspace.h"
 #include "page0types.h"
-#include "mtr0log.h"
 #include "log0recv.h"
 #include "my_cpu.h"
 #ifdef BTR_CUR_HASH_ADAPT
 # include "btr0sea.h"
 #endif
+#include "srv0start.h"
+#include "log.h"
 
 /** Iterate over a memo block in reverse. */
 template <typename Functor>
@@ -840,7 +841,6 @@ mtr_t::memo_release(const void* object, ulint type)
 
 static bool log_margin_warned;
 static time_t log_margin_warn_time;
-static bool log_close_warned;
 static time_t log_close_warn_time;
 
 /** Check margin not to overwrite transaction log from the last checkpoint.
@@ -878,8 +878,8 @@ static void log_margin_checkpoint_age(ulint len)
       log_margin_warned= true;
       log_margin_warn_time= t;
 
-      ib::error() << "innodb_log_file_size is too small "
-                     "for mini-transaction size " << len;
+      sql_print_error("InnoDB: innodb_log_file_size is too small "
+                      "for mini-transaction size " ULINTPF, len);
     }
   }
   else if (UNIV_LIKELY(lsn + margin <= log_sys.last_checkpoint_lsn +
@@ -1005,14 +1005,19 @@ static mtr_t::page_flush_ahead log_close(lsn_t lsn)
       checkpoint_age != lsn)
   {
     time_t t= time(nullptr);
-    if (!log_close_warned || difftime(t, log_close_warn_time) > 15)
+    if (!log_sys.overwrite_warned || difftime(t, log_close_warn_time) > 15)
     {
-      log_close_warned= true;
+      if (!log_sys.overwrite_warned)
+        log_sys.overwrite_warned= lsn;
       log_close_warn_time= t;
 
-      ib::error() << "The age of the last checkpoint is " << checkpoint_age
-                  << ", which exceeds the log capacity "
-                  << log_sys.log_capacity << ".";
+      sql_print_error("InnoDB: Crash recovery is broken due to"
+                      " insufficient innodb_log_file_size;"
+                      " last checkpoint LSN=" LSN_PF ", current LSN=" LSN_PF
+                      "%s.",
+                      lsn_t{log_sys.last_checkpoint_lsn}, lsn,
+                      srv_shutdown_state != SRV_SHUTDOWN_INITIATED
+                      ? ". Shutdown is in progress" : "");
     }
   }
   else if (UNIV_LIKELY(checkpoint_age <= log_sys.max_modified_age_async))

storage/innobase/srv/srv0srv.cc

@@ -398,9 +398,6 @@ mysql_mutex_t srv_misc_tmpfile_mutex;
 /** Temporary file for miscellanous diagnostic output */
 FILE*	srv_misc_tmpfile;
 
-static ulint	srv_main_thread_process_no;
-static ulint	srv_main_thread_id;
-
 /* The following counts are used by the srv_master_callback. */
 
 /** Iterations of the loop bounded by 'srv_active' label. */
@@ -895,12 +892,7 @@ srv_printf_innodb_monitor(
 			n_reserved);
 	}
 
-	fprintf(file,
-		"Process ID=" ULINTPF
-		", Main thread ID=" ULINTPF
-		", state: %s\n",
-		srv_main_thread_process_no,
-		srv_main_thread_id,
+	fprintf(file, "Process ID=0, Main thread ID=0, state: %s\n",
 		srv_main_thread_op_info);
 	fprintf(file,
 		"Number of rows inserted " ULINTPF
@@ -1487,31 +1479,29 @@ static void srv_sync_log_buffer_in_background()
 	}
 }
 
-/*********************************************************************//**
-This function prints progress message every 60 seconds during server
-shutdown, for any activities that master thread is pending on. */
-static
-void
-srv_shutdown_print_master_pending(
-/*==============================*/
-	time_t*		last_print_time,	/*!< last time the function
-						print the message */
-	ulint		n_bytes_merged)		/*!< number of change buffer
-						just merged */
+/** Report progress during shutdown.
+@param last   time of last output
+@param n_read number of page reads initiated for change buffer merge */
+static void srv_shutdown_print(time_t &last, ulint n_read)
 {
-	time_t current_time = time(NULL);
-
-	if (difftime(current_time, *last_print_time) > 60) {
-		*last_print_time = current_time;
+  time_t now= time(nullptr);
+  if (now - last >= 15)
+  {
+    last= now;
 
-		/* Check change buffer merge, we only wait for change buffer
-		merge if it is a slow shutdown */
-		if (!srv_fast_shutdown && n_bytes_merged) {
-			ib::info() << "Waiting for change buffer merge to"
-				" complete number of bytes of change buffer"
-				" just merged: " << n_bytes_merged;
-		}
-	}
+    const ulint ibuf_size= ibuf.size;
+    sql_print_information("Completing change buffer merge;"
+                          " %zu page reads initiated;"
+                          " %zu change buffer pages remain",
+                          n_read, ibuf_size);
+#if defined HAVE_SYSTEMD && !defined EMBEDDED_LIBRARY
+    service_manager_extend_timeout(INNODB_EXTEND_TIMEOUT_INTERVAL,
+                                   "Completing change buffer merge;"
+                                   " %zu page reads initiated;"
+                                   " %zu change buffer pages remain",
+                                   n_read, ibuf_size);
+#endif
+  }
 }
 
 /** Perform periodic tasks whenever the server is active.
@@ -1556,7 +1546,7 @@ Complete the shutdown tasks such as background DROP TABLE,
 and optionally change buffer merge (on innodb_fast_shutdown=0). */
 void srv_shutdown(bool ibuf_merge)
 {
-	ulint		n_bytes_merged	= 0;
+	ulint		n_read = 0;
 	time_t		now = time(NULL);
 
 	do {
@@ -1565,21 +1555,12 @@ void srv_shutdown(bool ibuf_merge)
 		++srv_main_shutdown_loops;
 
 		if (ibuf_merge) {
-			srv_main_thread_op_info = "checking free log space";
-			log_free_check();
 			srv_main_thread_op_info = "doing insert buffer merge";
-			n_bytes_merged = ibuf_merge_all();
-
-			/* Flush logs if needed */
-			srv_sync_log_buffer_in_background();
-		}
-
-		/* Print progress message every 60 seconds during shutdown */
-		if (srv_print_verbose_log) {
-			srv_shutdown_print_master_pending(&now,
-							  n_bytes_merged);
+			log_free_check();
+			n_read = ibuf_contract();
+			srv_shutdown_print(now, n_read);
 		}
-	} while (n_bytes_merged);
+	} while (n_read);
 }
 
 /** The periodic master task controlling the server. */