Using OMS DEBUG mode to troubleshoot OEM 12c problems

This time, I want to show you how to troubleshoot OEM problems by enabling DEBUG mode in the OMS. The virtual machine (VM) running my sandbox installation of OEM 12c 12.1.0.4 crashed during the night. After restarting the VM and all the OEM components, I wasn’t able to login using the SYSMAN account. The error… Continue reading Using OMS DEBUG mode to troubleshoot OEM 12c problems

OEM 12c very slow after upgrade to 12.1.0.4

I noticed that OEM 12c console was very slow a few hours after the upgrade to 12.1.0.4 version. Looking at the repository DB, found several OMS sessions consuming significant CPU resources. Bug 19199023 explains that some SQL queries executed against the repository consume high CPU on the servers. This bug affects the DB plug-in 12.1.0.6 and… Continue reading OEM 12c very slow after upgrade to 12.1.0.4

Cannot start ASM – ORA-15063: ASM discovered an insufficient number of disks for diskgroup “DATA”

Today, I faced and issue with an ASM instance. After bouncing the server, CRS went up along with the ASM instance, but the diskgroups were offline.$ crsctl status resource -t--------------------------------------------------------------------------------NAME           TARGET  STATE        SERVER                   STATE_DETAILS--------------------------------------------------------------------------------Local Resources--------------------------------------------------------------------------------ora.DATA.dg               ONLINE  OFFLINE      hostaora.FRA.dg               ONLINE  OFFLINE      hostaora.LISTENER.lsnr               ONLINE  ONLINE       hostaora.LISTENER_1.lsnr               ONLINE  ONLINE       hostaora.asm               ONLINE  ONLINE       hosta                 Startedora.ons               OFFLINE OFFLINE      hosta--------------------------------------------------------------------------------Cluster Resources--------------------------------------------------------------------------------ora.cssd     … Continue reading Cannot start ASM – ORA-15063: ASM discovered an insufficient number of disks for diskgroup “DATA”