Importance of using hugemem kernel with 32-bit Linux and >=6GB of RAM
(Doc ID 413874.1)
Last updated on AUGUST 04, 2018
Applies to:Linux OS - Version Enterprise Linux 3.0 and later
Unexplained instance crashes or hangs with ORA-600 , WAITED TOO LONG FOR ROW CACHE ENQUEUE LOCK, and GES potential blocker on CF enqueue messages in the alert.log. On RAC you may see cascading instance crashes or hangs in the cluster nodes running 32-bit architecture with >=6GB of RAM. ORA-600  is controlfile enqueue timeout, instance will crash after 15 minutes if unable to obtain that CF enqueue. This is intended behavior for the CF enqueue timeout.
32-bit Linux only
RedHat Enterprise Linux 3 and 4 only (hugemem kernel is default for Oracle Enterprise Linux)
So in this note Linux refers to these distributions on 32-bit architecture only
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