In the case of the listener then lsnrctl can be used to rename the log file On 17 May 2011 01:42, "Wolfgang Breitling" <breitliw@xxxxxxxxxxxxx> wrote: I have for years renamed the alert log on a weekly basis, and eventually gzipped it, in order to keep it reasonably sized. Oracle just starts a new alert log. Granted, I haven't done a direct bzip on it but that should be no different - except maybe, if the bzip takes a while and oracle tries to write to it while it is open by bzip. I haven't verified on 11.1.0.7 but on 11.2.0.2 that rename still works and Oracle creates a new alert log with the original name ( alert_instance.log ) so I am pretty confident it does also work for 11.1.0.7. In contrast to. e.g. the listener log, which you must not rename. There I do a cp to a new file followed by cp /dev/null > listener.log. On 2011-05-16, at 1:50 PM, Charles Schultz wrote: > On May 6th, the original alert_TEMDEV.log was bzipped and removed by a cron job. Usually we check ... -- //www.freelists.org/webpage/oracle-l