set global innodb_commit_concurrency=0;
ERROR 42000: Variable 'innodb_commit_concurrency' can't be set to the value of '0'
select @@innodb_commit_concurrency;
@@innodb_commit_concurrency
1
set global innodb_commit_concurrency=1;
select @@innodb_commit_concurrency;
@@innodb_commit_concurrency
1
set global innodb_commit_concurrency=42;
select @@innodb_commit_concurrency;
@@innodb_commit_concurrency
42
set global innodb_commit_concurrency=DEFAULT;
select @@innodb_commit_concurrency;
@@innodb_commit_concurrency
1
set global innodb_commit_concurrency=0;
ERROR 42000: Variable 'innodb_commit_concurrency' can't be set to the value of '0'
select @@innodb_commit_concurrency;
@@innodb_commit_concurrency
1
set global innodb_commit_concurrency=1;
select @@innodb_commit_concurrency;
@@innodb_commit_concurrency
1