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https://github.com/MariaDB/server.git
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5567a8c936
Implement a 10.4 redo log format, which extends the 10.3 format by introducing the MLOG_MEMSET record. MLOG_MEMSET: A new redo log record type for filling an area with a byte. mlog_memset(): Write the MLOG_MEMSET record. mlog_parse_nbytes(): Handle MLOG_MEMSET as well. trx_rseg_header_create(): Reduce the redo log volume by making use of mlog_memset() and the zero-initialization that happens inside page allocation. fil_addr_null: Remove. flst_init(): Create a variant that takes a zero-initialized buf_block_t* as a parameter, and only writes the FIL_NULL using mlog_memset(). flst_zero_addr(): A variant of flst_write_addr() that writes a null address using mlog_memset() for the FIL_NULL. The following fixes are replacing some use of MLOG_WRITE_STRING with the more compact MLOG_MEMSET record, or eliminating redundant redo log writes: btr_store_big_rec_extern_fields(): Invoke mlog_memset() for zero-initializing the tail of the ROW_FORMAT=COMPRESSED BLOB page. trx_sysf_create(), trx_rseg_format_upgrade(): Invoke mlog_memset() for zero-initializing the page trailer. fsp_header_init(), trx_rseg_header_create(): Remove redundant zero-initializations.
123 lines
3.4 KiB
Plaintext
123 lines
3.4 KiB
Plaintext
--source include/have_innodb.inc
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--source include/innodb_page_size.inc
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--source include/have_undo_tablespaces.inc
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SET @save_undo_logs = @@GLOBAL.innodb_undo_logs;
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SET @save_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
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SET @save_truncate = @@GLOBAL.innodb_undo_log_truncate;
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SET GLOBAL innodb_undo_log_truncate = 0;
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SET GLOBAL innodb_undo_logs = 4;
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SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
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SET @trunc_start=
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(SELECT variable_value FROM information_schema.global_status
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WHERE variable_name = 'innodb_undo_truncations');
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#-----------------------------------------------------------------------------
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#
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# Perform DML action using multiple clients and multiple undo tablespace.
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#
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#
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create table t1(keyc int primary key, c char(100)) engine = innodb;
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create table t2(keyc int primary key, c char(100)) engine = innodb;
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#
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delimiter |;
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CREATE PROCEDURE populate_t1()
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BEGIN
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DECLARE i INT DEFAULT 1;
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while (i <= 20000) DO
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insert into t1 values (i, 'a');
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SET i = i + 1;
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END WHILE;
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END |
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delimiter ;|
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#
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delimiter |;
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CREATE PROCEDURE populate_t2()
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BEGIN
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DECLARE i INT DEFAULT 1;
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while (i <= 20000) DO
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insert into t2 values (i, 'a');
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SET i = i + 1;
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END WHILE;
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END |
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delimiter ;|
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#
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#
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let DATADIR = `select @@datadir`;
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connect (con1,localhost,root,,);
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begin;
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send call populate_t1();
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connect (con2,localhost,root,,);
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begin;
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send call populate_t2();
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connection con1; reap; send update t1 set c = 'mysql';
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connection con2; reap; send update t2 set c = 'mysql';
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connection con1; reap; send update t1 set c = 'oracle';
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connection con2; reap; send update t2 set c = 'oracle';
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connection con1; reap; send delete from t1;
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connection con2; reap; delete from t2;
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connection con1; reap;
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let CHECKFILE = $MYSQL_TMP_DIR/check.txt;
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perl;
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($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size1)
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= stat("$ENV{DATADIR}/undo001");
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($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size2)
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= stat("$ENV{DATADIR}/undo002");
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open(OUT, ">$ENV{CHECKFILE}") || die;
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print OUT "let \$size1='$size1,$size2';\n";
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close(OUT);
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EOF
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SET GLOBAL innodb_undo_log_truncate = 1;
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commit; disconnect con1;
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connection con2; commit; disconnect con2;
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connection default;
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drop table t1, t2;
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drop PROCEDURE populate_t1;
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drop PROCEDURE populate_t2;
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--source include/wait_all_purged.inc
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# Truncation will normally not occur with innodb_page_size=64k,
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# and occasionally not with innodb_page_size=32k,
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# because the undo log will not grow enough.
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if (`select @@innodb_page_size IN (4096,8192,16384)`)
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{
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let $wait_condition = (SELECT variable_value!=@trunc_start
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FROM information_schema.global_status
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WHERE variable_name = 'innodb_undo_truncations');
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source include/wait_condition.inc;
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}
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--source $CHECKFILE
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perl;
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($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size1)
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= stat("$ENV{DATADIR}/undo001");
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($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size2)
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= stat("$ENV{DATADIR}/undo002");
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open(OUT, ">$ENV{CHECKFILE}") || die;
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print OUT "let \$size2='$size1,$size2';\n";
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close(OUT);
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EOF
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--source $CHECKFILE
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--remove_file $CHECKFILE
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if ($size1 == $size2)
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{
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# This fails for innodb_page_size=64k, occasionally also for 32k.
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if (`select @@innodb_page_size IN (4096,8192,16384)`)
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{
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echo Truncation did not happen: $size1;
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}
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}
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SET GLOBAL innodb_undo_logs = @save_undo_logs;
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SET GLOBAL innodb_purge_rseg_truncate_frequency = @save_frequency;
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SET GLOBAL innodb_undo_log_truncate = @save_truncate;
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