...ey is assigned to any memory region for which a pkey has not been explicitly assigned via pkey_mprotect (2). Protection keys have the potential to add a layer of security and re…overview of POSIX shared memory NAME shm_overview - overview of POSIX shared memory DESCRIPTION The POSIX shared memory API allows processes to communicate information by sharing a…optional parts of the POSIX standard NAME posixoptions - optional parts of the POSIX standard DESCRIPTION The POSIX standard (the information below is from POSIX.1-2001) describes …show the execution plan of a statement NAME EXPLAIN - show the execution plan of a statement SYNOPSIS EXPLAIN [ ( option [, ...] ) ] statement where option can be one of: ANALYZE […create new rows in a table NAME INSERT - create new rows in a table SYNOPSIS [ WITH [ RECURSIVE ] with_query [, ...] ] INSERT INTO table_name [ AS alias ] [ ( column_name [, ...] )…change the definition of a table NAME ALTER_TABLE - change the definition of a table SYNOPSIS ALTER TABLE [ IF EXISTS ] [ ONLY ] name [ * ] action [, ... ] ALTER TABLE [ IF EXISTS …