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15
TCP/IP
KeepAliveTime
Reduction
Reduce
this
setting
on
all
EEPC
servers
from
two
hours
(the
default)
to
five
minutes.
The
server
will
require
a
restart.
Once
this
is
done,
if
an
endpoint
client
loses
the
connection
with
the
server,
the
server
will
release
the
lock
after
approximately
5
minutes.
This
will
also
prevent
broken
remote
sbadmcl
connections
from
locking
the
scripting
user
account
for
2
hours.
Procedure
1.
Open
Regedit
2.
Go
to:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters
3.
Open
or
create
the
Dword
KeepAliveTime
4.
Change
the
value
to
300000
in
decimals
(Time
in
milliseconds)
Extra
info
The
KeepAliveTime
setting
controls
how
often
keep
‐
alive
packets
are
sent
in
milliseconds
(300,000
is
recommended).
It
controls
how
often
TCP
sends
a
keep
‐
alive
packet
to
verify
that
an
idle
connection
is
still
intact.
If
the
remote
computer
is
still
reachable,
it
acknowledges
the
keep
‐
alive
packet.
MS
KB
article:
http://support.microsoft.com/default.aspx?scid=kb;en
‐
us;324270#EQACAAA
Key:
Tcpip\Parameters
Value
Type:
REG_DWORD
(Time
in
milliseconds)
Valid
Range:
1
‐
0xFFFFFFFF
Default:
7,200,000
(two
hours)
NOTE
:
A
similar
setting
KeepAliveInterval
has
a
default
1000
(=
1
second),
this
setting
is
correct
so
do
not
change
this.
Last
Access
Time
Stamp
(NtfsDisableLastAccessUpdate)
With
large
databases,
it
is
possible
that
some
groups
may
become
overpopulated.
When
a
large
group
is
opened
(for
example
one
with
over
5000
users),
it
can
take
some
time
to
open.
To
reduce
hard
disk
read
and
write
time,
a
registry
setting
can
be
set
to
prevent
the
Last
Access
time
stamp
from
being
updated
on
every
file
access.
The
performance
boost
will
be
about
50%!
A
restart
is
needed
after
the
change.
Procedure
1.
Open
regedit.
2.
Go
to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem.
3.
Create
a
new
DWORD
value,
or
modify
the
existing
value,
named
"
NtfsDisableLastAccessUpdate
"
and
set
it
to
"
1
".
Microsoft
article:
http://technet2.microsoft.com/WindowsServer/en/library/80dc5066
‐
7f13
‐
4ac3
‐
8da8
‐
48ebd60b44471033.mspx?mfr=true
Windows
Server
as
a
File
Server
Tune
Microsoft
Windows
2003
server
to
be
a
file
server.
See
the
Microsoft
article
http://support.microsoft.com/kb/174619
about
this.
Theory
Increase
NTFS
MFT
(Master
File
Table,
used
to
be
FAT)
to
50%
of
the
disk
space.
The
result
is
that
small
files
are
being
stored
in
the
MFT
and
not
as
separate
files
in
the
NTFS.
This
helps
a
lot
because
we
have
thousands
of
small
files.
Procedure