OEM 13c New Features – System Broadcast

I can’t finish the year without a post about OEM 13c. I finally had some time to install it and from first hand go through its new features.  I find this “System Broadcast” feature so useful, especially when you have tons of users using OEM. You can try to email users, give them a call… Continue reading OEM 13c New Features – System Broadcast

ORA-01555 query duration 0 seconds with Dataguard

How many times we have calls from users complaining about their process that failed due to an ORA-01555 error?We know that if the queries are not well tuned and they modify a lot of data, the image held in the UNDO Tablespace could not be consistent with the real data. But have you ever seen… Continue reading ORA-01555 query duration 0 seconds with Dataguard