User`s guide

DBA Startup Variables
B-8 Oracle Database Installation and Administration Guide
Classification: DBA
Default: KNL_BASE = 72M
B.4.12 ORACLE_HOME
The Oracle home directory is the directory in the POSIX file system which contains the
installation of the software for a particular Oracle product.
Format:
ORACLE_HOME = /path-name
Classification: DBA , USER
B.4.13 PGA_BASE
This variable specifies the base address of the fixed part of the PGA. The PGA is
task-specific, but must be located at a fixed memory address so that the kernel can
access it. The base address must lie on a 64KB boundary.
Format:
PGA_BASE = address
Classification: DBA
Default: PGA_BASE = 189M
Note: The value of PGA_BASE is taken from the kernel if the shared
kernel is already loaded.
B.4.14 PGA_SIZE
This variable specifies the size of the fixed part of the PGA. This variable should not be
changed from its default value.
Format:
PGA_SIZE = size
Classification: DBA
Default: PGA_SIZE = 64K
Note: The value of PGA_SIZE is taken from the kernel if the shared
kernel is already loaded.
B.4.15 SF_PBLKSIZE
This variable specifies the physical blocksize of redo log files.
Format:
SF_PBLKSIZE = 2K|4K
Classification: DBA
Default: 2K
Note: This variable cannot be changed after database creation. Once
you specify a value different from the default, you must specify it in
all future calls.