Hi, there are some failures in my specific database. First: I  have regrant the permissions into the database to my monitoring user.  Second: enabled OS monitoring. The alarm was cleared by rule.  Conclusion: The tablespace monitoring is working as expected - that's  also true for autoextensible files/tablespaces. Regards Jochen
Basically, we've turned off monitoring using "DBO - Tablespace Used Pct" because of the autoextend implementation across all our databases. The existing Rule appears to be based on percent used of "Allocated" space. All tablespaces will therefore alert as each crosses their thresholds prior to going 100% full and autoextending. It appears that the only way around this is to write a new rule to evaluate relative free space in the data files. This would be done at the database level using SQL against the  SYS.dba_data_files (MAXBYTES, USER_BYTES) and SYS.dba_free_space (BYTES) definitions and doing some maths (not forgetting some degree of filtering). Our preference would be to use the current Foglight DBO data to drive a valid rule. Any comments  would be appreciated.  Cheers Col
Foglight v5.5.5 tablespace monitoring when using autoextend