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14685b10df
The motivation of introducing the parameter innodb_purge_rseg_truncate_frequency in mysql/mysql-server@28bbd66ea5 and mysql/mysql-server@8fc2120fed seems to have been to avoid stalls due to freeing undo log pages or truncating undo log tablespaces. In MariaDB Server, innodb_undo_log_truncate=ON should be a much lighter operation than in MySQL, because it will not involve any log checkpoint. Another source of performance stalls should be trx_purge_truncate_rseg_history(), which is shrinking the history list by freeing the undo log pages whose undo records have been purged. To alleviate that, we will introduce a purge_truncation_task that will offload this from the purge_coordinator_task. In that way, the next innodb_purge_batch_size pages may be parsed and purged while the pages from the previous batch are being freed and the history list being shrunk. The processing of innodb_undo_log_truncate=ON will still remain the responsibility of the purge_coordinator_task. purge_coordinator_state::count: Remove. We will ignore innodb_purge_rseg_truncate_frequency, and act as if it had been set to 1 (the maximum shrinking frequency). purge_coordinator_state::do_purge(): Invoke an asynchronous task purge_truncation_callback() to free the undo log pages. purge_sys_t::iterator::free_history(): Free those undo log pages that have been processed. This used to be a part of trx_purge_truncate_history(). purge_sys_t::clone_end_view(): Take a new value of purge_sys.head as a parameter, so that it will be updated while holding exclusive purge_sys.latch. This is needed for race-free access to the field in purge_truncation_callback(). Reviewed by: Vladislav Lesin
84 lines
2.2 KiB
Plaintext
84 lines
2.2 KiB
Plaintext
#
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# Test opening a corrupted table.
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#
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# Restarting is not supported under embedded
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-- source include/not_embedded.inc
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# Require InnoDB
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-- source include/have_innodb.inc
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-- source include/not_encrypted.inc
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--disable_query_log
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call mtr.add_suppression("InnoDB: Table `test`\\.`t1` is corrupted\\. Please drop the table and recreate\\.");
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call mtr.add_suppression("InnoDB: Database page corruption on disk or a failed read of file '.*test.t1\\.ibd' page");
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call mtr.add_suppression("InnoDB: We detected index corruption in an InnoDB type table");
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call mtr.add_suppression("Index for table 't1' is corrupt; try to repair it");
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call mtr.add_suppression("InnoDB: File '.*test/t1\\.ibd' is corrupted");
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--enable_query_log
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--echo # Ensure that purge will not crash on the table after we corrupt it.
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SET GLOBAL innodb_fast_shutdown=0;
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--echo # Create and populate the table to be corrupted
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set global innodb_file_per_table=ON;
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CREATE TABLE t1 (a INT AUTO_INCREMENT PRIMARY KEY, b TEXT) ENGINE=InnoDB;
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INSERT INTO t1 (b) VALUES ('corrupt me');
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--disable_query_log
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--let $i = 10
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while ($i)
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{
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INSERT INTO t1 (b) VALUES (REPEAT('abcdefghijklmnopqrstuvwxyz', 100));
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dec $i;
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}
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--enable_query_log
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INSERT INTO t1 (b) VALUES ('corrupt me');
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let $MYSQLD_DATADIR=`select @@datadir`;
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let t1_IBD = $MYSQLD_DATADIR/test/t1.ibd;
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--source include/shutdown_mysqld.inc
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--echo # Corrupt the table
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perl;
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use strict;
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use warnings;
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use Fcntl qw(:DEFAULT :seek);
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my $ibd_file = $ENV{'t1_IBD'};
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my $chunk;
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my $len;
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sysopen IBD_FILE, $ibd_file, O_RDWR || die "Unable to open $ibd_file";
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while ($len = sysread IBD_FILE, $chunk, 1024)
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{
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if ($chunk =~ s/corrupt me/korrupt me/)
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{
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print "Munged a string.\n";
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sysseek IBD_FILE, -$len, SEEK_CUR;
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syswrite IBD_FILE, $chunk, $len;
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}
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}
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close IBD_FILE;
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EOF
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--source include/start_mysqld.inc
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--echo # Now t1 is corrupted but we should not crash
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--error ER_GET_ERRNO,ER_NOT_KEYFILE,ER_INDEX_CORRUPT,ER_NO_SUCH_TABLE_IN_ENGINE
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SELECT * FROM t1;
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--error 126,ER_GET_ERRNO,ER_NOT_KEYFILE,ER_INDEX_CORRUPT,ER_NO_SUCH_TABLE_IN_ENGINE
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INSERT INTO t1(b) VALUES('abcdef');
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--error ER_GET_ERRNO,ER_NOT_KEYFILE,ER_INDEX_CORRUPT,ER_NO_SUCH_TABLE_IN_ENGINE
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UPDATE t1 set b = 'deadbeef' where a = 1;
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--echo # Cleanup, this must be possible
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DROP TABLE t1;
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