One day I get request from my friend such as his database crashed and after restart he could not start it up. His database version is Oracle 11g R2. I tried to start up database but it raised : SQL> startup ORA-00845: MEMORY_TARGET not supported on this system SQL> exit Hmmmmm, that`s new for me, never faced before. Checked disk space [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/cciss/c0d0p3 209G 27G 171G 14% / /dev/cciss/c0d1p1 903G 265G 592G 31% /oradata /dev/cciss/c0d0p1 99M 24M 71M 26% /boot tmpfs 3.9G 0 3.9G 0% /dev/shm [root@localhost ~]# Increased tmpfs size. To do that open fstab file via any editable program (gedit, vi etc) [root@localhost ~]# vi /etc/fstab ... tmpfs /...