Tried to startup a database to nomount, but failed.
SQL> startup nomount;
ORA-27137: unable to allocate large pages to create a shared memory segment
Linux-x86_64 Error: 12: Cannot allocate memory
Additional information: 402653184
Additional information: 1
Except that you have special reasons to use hugepagesfor this database, you can disable it by this.
SQL> alter system set use_large_pages=FALSE scope=spfile;
SQL> shutdown immediate;