Fix ORA-01157: cannot identify/lock data file # - see DBWR trace file ORA-01110: data file #: ORA-01136: specified size of file # (n blocks) is less than original size

Error Description: One of my applications is failing with following oracle error message.

"ORA-01157: cannot identify/lock data file 76 - see DBWR trace file ORA-01110: data file 76:

Oracle SQL Select Statement / Function to get Server Memory, CPU and Processor details

Once I got a requirement to fetch the server details. Initially I thought of login to each and every box and get the details. But if it is one or ten box it’s okay to get the details manually. But if you think about 100s of servers and also periodic activity,

ORA-27125: unable to create shared memory segment Linux-x86_64 Error: 2: No such file or directory

Error Description:

Database startup failed with following error after increasing the value for SGA_TARGET and SGA_MAX_SIZE
ORA-27125: unable to create shared memory segment