Quick post because we just updated all of our customers using Oracle Restart.
The default setting for Oracle Restart to check ASM is every second. That can lead to hundreds of thousands or millions of audit files in your Grid home under $GRID_HOME/rdbms/audit.
Fun fact: those files are so small, that they can leave plenty of space on the drive, but exhaust all of the inodes (index nodes or filesystem metadata) on the drive. And most monitoring systems only check for storage and / or blocks, not inode consumption.
Put all of this together, and you can get ASM hanging, which can take down all of the databases on top of it. Layer in some control file corruption during that, and Oracle DBAs have just signed up for a fun day of restore and recover.
To avoid all of that, make a quick change to the Oracle Restart interval to check every 60 seconds instead of every second:
crsctl stat res ora.asm -p |grep ^CHECK_INTERVAL crsctl modify resource ora.asm -init -attr "CHECK_INTERVAL=60" crsctl stat res ora.asm -p |grep ^CHECK_INTERVAL