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enq: FS contention being reported on (ARCa) process

edited Jan 11, 2010 3:52PM in Database Administration (MOSC) 1 commentAnswered
 Arch process is consuming 50% CPU with FS enqueue all the time, we understand that it should be relevant to be below
This is what fs equeue mean:

- When performing a drop tablespace command
- When renaming a tablespace's datafile
- When adding, dropping, clearing, renaming a redo log
- When recreating datafiles in their original, empty state
- When dropping a temporary file

1) The redo files were resized however it was done on 3 production environments . The problem started on one of those systems on 11/11 after 3 days when the sysadmins migrated the datafiles to new SAN disk.  The archive logs are writing to SATA drives on a separate mount.  

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