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MDEV-23855 follow-up: Make innodb.doublewrite more stable

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The test innodb.doublewrite could occasionally fail with 64KiB page size
because the page 0 would no longer be in the doublewrite buffer.
Let us stop purge before the server is killed, and ensure that
the entire buffer pool will be flushed before we initiate an extra
write of page 0.
This commit is contained in:
Marko Mäkelä
2021-05-05 12:51:44 +03:00
parent f673277491
commit d44a10f4dd
2 changed files with 13 additions and 7 deletions
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11
mysql-test/suite/innodb/t/doublewrite.test
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@@ -34,6 +34,10 @@ show variables like 'innodb_doublewrite';
show variables like 'innodb_fil_make_page_dirty_debug';
show variables like 'innodb_saved_page_number_debug';
connect (stop_purge,localhost,root,,);
START TRANSACTION WITH CONSISTENT SNAPSHOT;
connection default;
create table t1 (f1 int primary key, f2 blob) engine=innodb;
start transaction;
@@ -51,12 +55,10 @@ commit work;
select space from information_schema.innodb_sys_tables
where name = 'test/t1' into @space_id;
--echo # Ensure that dirty pages of table t1 is flushed.
flush tables t1 for export;
unlock tables;
begin;
insert into t1 values (6, repeat('%', 12));
--echo # Ensure that dirty pages of table t1 are flushed.
set global innodb_buf_flush_list_now = 1;
--source ../include/no_checkpoint_start.inc
@@ -69,6 +71,7 @@ set global innodb_buf_flush_list_now = 1;
--let CLEANUP_IF_CHECKPOINT=drop table t1;
--source ../include/no_checkpoint_end.inc
disconnect stop_purge;
--echo # Make the first page (page_no=0) of the user tablespace
--echo # full of zeroes.