https://bugs.openldap.org/show_bug.cgi?id=9398
--- Comment #2 from Ondřej Kuzník ondra@mistotebe.net --- syncprov might be able to tell the backend not to commit its TXN on applying the modification, then send the contextCSN update in the result callback. Would remove some of the concerns about performance and I/O impact that has caused us to do contextCSN checkpoints.