ASM slave processes (ONNN) left open causing CPU 100% and ORA-00700[kfnReleaseASM1] error on database
Last updated on FEBRUARY 19, 2013
Applies to:Oracle Database - Enterprise Edition - Version 188.8.131.52 and later
Information in this document applies to any platform.
ORA-700[KFNRELEASEASM1] SIGNALED BY CKPT ON DATABASE AFTER EXHAUSTED FRA
If the ASM slave processes remain idle for 250 days, it starts spinning in infinite loop.
As a workaround, you can kill the Onn process during a maintenance window and restart DB.
The main purpose of Onn process is open connection between the database instance and the ASM to perform metadata operations such as create datafile.
The patch was discovered due to the flash recovery area becoming full
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