IBM Frozen Dessert Maker VERSION 9 Manual De Usuario
Chapter
1.
Installation
prerequisites
Disk
and
memory
requirements
Disk
requirements:
The
disk
space
required
for
your
product
depends
on
the
type
of
installation
you
choose
and
the
type
of
file
system
you
have.
The
DB2
Setup
wizard
provides
dynamic
size
estimates
based
on
the
components
selected
during
a
typical,
compact,
or
custom
installation.
On
Windows
®
,
you
might
require
significantly
more
space
on
FAT
(File
Allocation
Table)
drives
with
large
cluster
sizes
than
with
NTFS
(New
Technology
File
System)
drives.
Remember
to
include
disk
space
for
required
software
and
communication
products.
Memory
requirements:
At
a
minimum,
a
DB2
database
system
requires
256
MB
of
RAM.
For
a
system
running
just
DB2
and
the
DB2
GUI
tools,
a
minimum
of
512
MB
of
RAM
is
required.
However,
1
GB
of
RAM
is
recommended
for
improved
performance.
These
requirements
do
not
include
any
additional
memory
requirements
for
other
software
that
is
running
on
your
system.
When
determining
memory
requirements,
be
aware
of
the
following:
v
For
DB2
client
support,
these
memory
requirements
are
for
a
base
of
five
concurrent
client
connections.
You
will
need
an
additional
16
MB
of
RAM
per
five
client
connections.
v
Memory
requirements
are
affected
by
the
size
and
complexity
of
your
database
system,
as
well
as
by
the
extent
of
database
activity
and
the
number
of
clients
accessing
your
system.
In
DB2
Version
9,
the
new
self-tuning
memory
feature
simplifies
the
task
of
memory
configuration
by
automatically
setting
values
for
several
memory
configuration
parameters.
When
enabled,
the
memory
tuner
dynamically
distributes
available
memory
resources
among
several
memory
consumers
including
sort,
the
package
cache,
the
lock
list
and
buffer
pools.
v
On
Linux
™
,
SWAP
space
at
least
twice
as
large
as
RAM
is
recommended.
Related
concepts:
v
“Self
tuning
memory”
in
Performance
Guide
Getting
started
with
database
authorities
Authorities
provide
a
way
both
to
group
privileges
and
to
control
maintenance
and
utility
operations
for
instances,
databases,
and
database
objects.
Users
can
have
administrative
authorities
that
give
full
privileges
on
a
set
of
database
objects,
or
they
can
have
system
authorities
that
give
full
privileges
on
managing
the
system
but
do
not
allow
access
to
the
data.
©
Copyright
IBM
Corp.
1993,
2006
3