I have a server where the history length keeps growing. At first we had them in shared system space but we moved them with using innodb_undo_tablespaces. This did not helped us either.
Right now the length is 124355327 and the server is not making transactions right now (for 1 hour) just to see if the purge starts. It's pretty idle.
Ihave the following parameters, most of them are extreme just to trigger some purge actions.
{{MariaDB [(none)]> show global variables like "innodb%purge%";
| innodb_max_purge_lag |
50000 |
| innodb_max_purge_lag_delay |
0 |
| innodb_max_purge_lag_wait |
4294967295 |
| innodb_purge_batch_size |
300 |
| innodb_purge_rseg_truncate_frequency |
1 |
| innodb_purge_threads |
32 |
| innodb_undo_log_truncate |
1 |
innodb status:
Purge done for trx's n:o < 258032014 undo n:o < 5633661 state: running
|
History list length 124560317
|
Looks a little bit like #MDEV-29401 but that one should be fixed by the version we are already using.
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Bug
Major
Sorry this isn't a bug. I made a miscalculation in de undo logsizes where I triggered lazy purging.