MDEV-13626: Clean up the buffer pool resizing tests from MySQL 5.7

buf_pool_resize(): Simplify the fault injection
for innodb.buf_pool_resize_oom.

innodb.buf_pool_resize_oom: Use a small buffer pool.

innodb.innodb_buffer_pool_load_now: Make use of the sequence engine,
to avoid creating explicit InnoDB record locks. Clean up the
accesses to information_schema.innodb_buffer_page_lru.

5 files changed, 42 insertions, 67 deletions

diff --git a/mysql-test/suite/innodb/r/innodb_buffer_pool_load_now.result b/mysql-test/suite/innodb/r/innodb_buffer_pool_load_now.result
index b2b1da92b4c..14ea44550e0 100644
--- a/mysql-test/suite/innodb/r/innodb_buffer_pool_load_now.result
+++ b/mysql-test/suite/innodb/r/innodb_buffer_pool_load_now.result
@@ -2,22 +2,26 @@ SET GLOBAL innodb_buffer_pool_dump_pct=100;
 CREATE TABLE ib_bp_test
 (a INT AUTO_INCREMENT, b VARCHAR(64), c TEXT, PRIMARY KEY (a), KEY (b, c(128)))
 ENGINE=INNODB;
+SELECT PAGE_NUMBER FROM information_schema.innodb_buffer_page_lru
+WHERE table_name = '`test`.`ib_bp_test`';
+PAGE_NUMBER
+3
+4
+SELECT SPACE INTO @space FROM information_schema.innodb_buffer_page_lru
+WHERE table_name = '`test`.`ib_bp_test`' AND PAGE_NUMBER=3;
+INSERT INTO ib_bp_test
+SELECT NULL, REPEAT('b', 64), REPEAT('c', 256) FROM seq_1_to_16382;
 SELECT COUNT(*) FROM information_schema.innodb_buffer_page_lru
-WHERE table_name LIKE '%ib_bp_test%';
+WHERE table_name = '`test`.`ib_bp_test`';
 COUNT(*)
-2
-SELECT COUNT(*) FROM information_schema.innodb_buffer_page_lru
-WHERE table_name LIKE '%ib_bp_test%';
-COUNT(*)
-{checked_valid}
+596
 SET GLOBAL innodb_buffer_pool_dump_now = ON;
-SELECT COUNT(*) FROM information_schema.innodb_buffer_page_lru
-WHERE table_name LIKE '%ib_bp_test%';
-COUNT(*)
-0
-select count(*) from ib_bp_test where a = 1;
+SET GLOBAL innodb_fast_shutdown=0;
+SELECT PAGE_NUMBER FROM information_schema.innodb_buffer_page_lru
+WHERE table_name = '`test`.`ib_bp_test`';
+PAGE_NUMBER
+select count(*) from ib_bp_test LIMIT 0;
 count(*)
-1
 SET GLOBAL innodb_buffer_pool_load_now = ON;
 SELECT variable_value
 FROM information_schema.global_status
@@ -25,9 +29,9 @@ WHERE LOWER(variable_name) = 'innodb_buffer_pool_load_status';
 variable_value
 Buffer pool(s) load completed at TIMESTAMP_NOW
 SELECT COUNT(*) FROM information_schema.innodb_buffer_page_lru
-WHERE table_name LIKE '%ib_bp_test%';
+WHERE table_name = '`test`.`ib_bp_test`';
 COUNT(*)
-{checked_valid}
+596
 call mtr.add_suppression("InnoDB: Error parsing");
 SET GLOBAL innodb_buffer_pool_load_now = ON;
 # Re-write some valid pages to the dump file, make sure the space
diff --git a/mysql-test/suite/innodb/t/buf_pool_resize_oom.opt b/mysql-test/suite/innodb/t/buf_pool_resize_oom.opt
index 21350cdcfaf..09fd8bd8e35 100644
--- a/mysql-test/suite/innodb/t/buf_pool_resize_oom.opt
+++ b/mysql-test/suite/innodb/t/buf_pool_resize_oom.opt
@@ -1 +1 @@
---innodb-buffer-pool-size=1G
+--innodb-buffer-pool-size=8m --innodb-buffer-pool-chunk-size=1m
diff --git a/mysql-test/suite/innodb/t/buf_pool_resize_oom.test b/mysql-test/suite/innodb/t/buf_pool_resize_oom.test
index 4bddac78594..b0aa20b566f 100644
--- a/mysql-test/suite/innodb/t/buf_pool_resize_oom.test
+++ b/mysql-test/suite/innodb/t/buf_pool_resize_oom.test
@@ -1,7 +1,5 @@
 --source include/have_innodb.inc
 --source include/have_debug.inc
-# Allocating 1 GiB of buffer pool is pretty steep!
---source include/big_test.inc
 --source include/not_embedded.inc
 
 --echo #
diff --git a/mysql-test/suite/innodb/t/innodb_buffer_pool_load_now.test b/mysql-test/suite/innodb/t/innodb_buffer_pool_load_now.test
index 5bc07dbce0d..baced6e9e11 100644
--- a/mysql-test/suite/innodb/t/innodb_buffer_pool_load_now.test
+++ b/mysql-test/suite/innodb/t/innodb_buffer_pool_load_now.test
@@ -11,6 +11,7 @@
 --source include/have_innodb.inc
 # include/restart_mysqld.inc does not work in embedded mode
 --source include/not_embedded.inc
+--source include/have_sequence.inc
 
 --let $file = `SELECT CONCAT(@@datadir, @@global.innodb_buffer_pool_filename)`
 
@@ -26,32 +27,19 @@ CREATE TABLE ib_bp_test
 (a INT AUTO_INCREMENT, b VARCHAR(64), c TEXT, PRIMARY KEY (a), KEY (b, c(128)))
 ENGINE=INNODB;
 
-let $check_cnt =
+SELECT PAGE_NUMBER FROM information_schema.innodb_buffer_page_lru
+WHERE table_name = '`test`.`ib_bp_test`';
+
+SELECT SPACE INTO @space FROM information_schema.innodb_buffer_page_lru
+WHERE table_name = '`test`.`ib_bp_test`' AND PAGE_NUMBER=3;
+
+let SPACE=`SELECT @space`;
+
+INSERT INTO ib_bp_test
+SELECT NULL, REPEAT('b', 64), REPEAT('c', 256) FROM seq_1_to_16382;
+
 SELECT COUNT(*) FROM information_schema.innodb_buffer_page_lru
-WHERE table_name LIKE '%ib_bp_test%';
-
---let SPACE = `SELECT space FROM information_schema.innodb_sys_tables WHERE name LIKE '%ib_bp_test%'`
-
-# See that we have a small number of pages in the LRU
---eval $check_cnt
-
-# Here we end up with 16382 rows in the table
---disable_query_log
-INSERT INTO ib_bp_test (b, c) VALUES (REPEAT('b', 64), REPEAT('c', 256));
-INSERT INTO ib_bp_test (b, c) VALUES (REPEAT('B', 64), REPEAT('C', 256));
-let $i=12;
-while ($i)
-{
-  --eval INSERT INTO ib_bp_test (b, c) VALUES ($i, $i * $i);
-  INSERT INTO ib_bp_test (b, c) SELECT b, c FROM ib_bp_test;
-  dec $i;
-}
---enable_query_log
-
-# Accept 83 for 64k page size, 163 for 32k page size, 329 for 16k page size,
-# 662 for 8k page size & 1392 for 4k page size
---replace_result 83 {checked_valid} 163 {checked_valid} 329 {checked_valid} 662 {checked_valid} 1392 {checked_valid}
---eval $check_cnt
+WHERE table_name = '`test`.`ib_bp_test`';
 
 # Dump
 SET GLOBAL innodb_buffer_pool_dump_now = ON;
@@ -81,6 +69,8 @@ EOF
 
 --move_file $file $file.now
 
+# Complete purge (and change buffer merge).
+SET GLOBAL innodb_fast_shutdown=0;
 --source include/shutdown_mysqld.inc
 
 # Make sure no dump after shutdown
@@ -92,10 +82,11 @@ EOF
 --move_file $file.now $file
 
 # See that we have no pages in the LRU
---eval $check_cnt
+SELECT PAGE_NUMBER FROM information_schema.innodb_buffer_page_lru
+WHERE table_name = '`test`.`ib_bp_test`';
 
 # Load the table so that entries in the I_S table do not appear as NULL
-select count(*) from ib_bp_test where a = 1;
+select count(*) from ib_bp_test LIMIT 0;
 
 # Load
 SET GLOBAL innodb_buffer_pool_load_now = ON;
@@ -117,10 +108,8 @@ FROM information_schema.global_status
 WHERE LOWER(variable_name) = 'innodb_buffer_pool_load_status';
 --enable_warnings
 
-# Accept 83 for 64k page size, 163 for 32k page size, 329 for 16k page size,
-# 662 for 8k page size & 1392 for 4k page size
---replace_result 83 {checked_valid} 163 {checked_valid} 329 {checked_valid} 662 {checked_valid} 1392 {checked_valid}
---eval $check_cnt
+SELECT COUNT(*) FROM information_schema.innodb_buffer_page_lru
+WHERE table_name = '`test`.`ib_bp_test`';
 
 # Add some total garbage to the dump file
 --let IBDUMPFILE = $file
diff --git a/storage/innobase/buf/buf0buf.cc b/storage/innobase/buf/buf0buf.cc
index d80eadcfc70..57dc54f38b4 100644
--- a/storage/innobase/buf/buf0buf.cc
+++ b/storage/innobase/buf/buf0buf.cc
@@ -2,7 +2,7 @@
 
 Copyright (c) 1995, 2018, Oracle and/or its affiliates. All Rights Reserved.
 Copyright (c) 2008, Google Inc.
-Copyright (c) 2013, 2019, MariaDB Corporation.
+Copyright (c) 2013, 2020, MariaDB Corporation.
 
 Portions of this file contain modifications contributed and copyrighted by
 Google, Inc. Those modifications are gratefully acknowledged and are described
@@ -2648,23 +2648,6 @@ buf_pool_resize_hash(
 	buf_pool->zip_hash = new_hash_table;
 }
 
-#ifndef DBUG_OFF
-/** This is a debug routine to inject an memory allocation failure error. */
-static
-void
-buf_pool_resize_chunk_make_null(buf_chunk_t** new_chunks)
-{
-	static int count = 0;
-
-	if (count == 1) {
-		ut_free(*new_chunks);
-		*new_chunks = NULL;
-	}
-
-	count++;
-}
-#endif // DBUG_OFF
-
 /** Resize the buffer pool based on srv_buf_pool_size from
 srv_buf_pool_old_size. */
 static
@@ -2931,7 +2914,8 @@ withdraw_retry:
 					ut_zalloc_nokey_nofatal(new_chunks_size));
 
 			DBUG_EXECUTE_IF("buf_pool_resize_chunk_null",
-				buf_pool_resize_chunk_make_null(&new_chunks););
+					ut_free(new_chunks);
+					new_chunks = NULL;);
 
 			if (new_chunks == NULL) {
 				ib::error() << "buffer pool " << i