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Assert that keys don't point to bitmap pages. storage/maria/ma_blockrec.h: assertion storage/maria/ma_locking.c: With concurrent INSERTs, it is possible that two threads enter _ma_mark_file_changed() at the same time, so they should serialize their access to the "changed" state/share members; another reason is that this function may call _ma_update_state_lsns_sub() which may call translog_deassign_id_from_share() (I saw it during testing of online backup) which requires the intern_lock mutex. As INSERTs only change from "not changed" to "changed", we can first check without mutex: if it says "changed", some other thread has set or is setting the variables now, we don't need to do it; if it says "not changed", we serialize and re-check. |
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