SELECT value/1024/1024 MB FROM v$parameter WHERE name='sga_max_size'; Check free memory :
# Current semaphore limits (SEMMSL, SEMMNS, SEMOPM, SEMMNI) ipcs -ls | grep "max number of arrays" cat /proc/sys/kernel/sem Recommended for Oracle:
# shmmax = 80% of RAM, shmall = shmmax / 4096 (page size) echo "kernel.shmmax = 68719476736" >> /etc/sysctl.conf # 64GB echo "kernel.shmall = 16777216" >> /etc/sysctl.conf sysctl -p :
ipcs -s | grep oracle | awk 'print $2' | xargs -n1 ipcrm -s Linux :
oracle soft nproc 16384 oracle hard nproc 32768 oracle soft nofile 65536 oracle hard nofile 65536 in /etc/system :