I think, v$archived_log should give you that. select name, blocks*block_size from V$ARCHIVED_LOG ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of rjamya Sent: Monday, June 11, 2007 1:51 PM To: Oracle Discussion List Subject: Redo logs size It is possible to find out using dictionary/v$ views how much the online redo log file contained when it was switched? i.e. it is possible to estimate/calculate mb of archive log generated per hour without doing calculations at os level? version 9i and above. i have looked in the manuals and metalink, but didn't find any references. Perhaps i missed. Best regards RJamya