7-60

User

Guide

for

the

Cisco

Application

Networking

Manager

5.2

OL-26572-01

Chapter

7

Configuring

Virtual

Servers

Configuring

Virtual

Servers

UTF-8

Character

Set

Threshold

Number

of

8-bit

Unicode

Transformation

Format

(UTF-8)

characters

that

need

to

appear

on

a

page

to

create

a

UTF-8

character

set

page.

The

UTF-8

character

set

is

an

international

standard

that

allows

Web

pages

to

display

non-ASCII

or

non-English

multibyte

characters.

It

can

represent

any

universal

character

in

the

Unicode

standard

and

is

backwards

compatible

with

ASCII.

Valid

entries

are

from

1

to

1,000,000.

Server

Load

Threshold

Tr

i

g

g

e

r

(

%)

Threshold,

expressed

as

a

percent,

at

which

the

TTL

for

cached

objects

is

to

be

changed.

The

server

load

threshold

trigger

indicates

that

the

time-to-live

(TTL)

period

for

cached

objects

is

to

be

based

dynamically

on

server

l

oad.

With

this

method,

TTL

periods

increase

i

f

the

current

response

time

from

the

origin

sever

is

greater

than

the

average

response

time

and

decrease

if

the

current

response

time

from

the

origin

server

is

less

than

the

average

response

time

when

the

difference

in

response

times

exceeds

a

specified

threshold

amount.

Valid

entries

are

from

0

to

100

percent.

Server

Load

Time-To-Live

Change

(%)

Percentage

by

which

the

cache

TTL

is

to

be

increased

or

decreased

when

the

server

load

threshold

trigger

is

met.

This

option

specifies

the

percentage

by

which

the

cache

TTL

is

increased

or

decreased

in

response

to

a

change

in

server

load.

For

example,

if

this

value

is

set

to

20

and

the

current

TTL

for

a

response

is

300

seconds,

and

if

the

cur

rent

ser

ver

response

times

exceeds

the

trigger

threshold,

the

cache

TTL

for

the

response

is

raised

to

360

seconds.

Valid

entries

are

from

0

to

100

percent.

Delta

Optimization

Mode

Method

by

which

delta

optimization

is

to

be

implemented:

•

N/A—Indicates

that

a

delta

optimization

mode

is

not

configured.

•

Enable

The

All-User

Mode

For

Delta

Optimization—Indicates

that

the

ACE

is

to

generate

the

delta

against

a

single

base

file

that

is

shared

by

all

users

of

the

URL.

This

option

is

usable

in

most

cases

if

the

structure

of

a

page

is

common

across

all

users,

and

the

disk

space

overhead

is

minimal.

•

Enable

The

Per-User

Mode

For

Delta

Optimization—Indicates

that

the

ACE

is

to

generate

the

delta

against

a

base

file

that

is

created

specifically

for

that

user.

This

option

is

useful

when

page

contents,

including

layout

elements,

are

different

for

each

user,

and

delivers

the

highest

level

of

condensation.

However,

this

increases

disk

space

requirements

because

a

copy

of

the

base

page

that

is

delivered

to

each

user

is

cached.

This

option

is

useful

when

privacy

is

required

because

base

pages

are

not

shared

among

users.

Enable

Appscope

Options

Appscope

Optimize

Rate

(%)

Percentage

of

all

requests

or

sessions

to

be

sampled

for

performance

with

acceleration

(or

optimization)

applied.

All

applicable

optimizations

for

the

class

will

be

performed.

Valid

entries

are

from

0

to

100

percent,

with

a

default

of

10

percent.

The

sum

of

this

value

and

the

value

entered

in

the

Passtthrough

Rate

Per

cent

field

must

not

exceed

100.

Appscope

Passthrough

Rate

(%)

Percentage

of

all

requests

or

se

ssions

to

be

sampled

for

performance

without

optimization.

No

optimizations

for

the

class

will

be

performed.

Valid

entries

are

from

0

to

100,

with

a

default

of

10

percent.

The

sum

of

this

value

and

the

value

entered

in

the

Optimize

Rate

Percent

field

must

not

exceed

100.

Table

7-18

Application

Acceleration

and

Optimization

Additional

Configuration

Options

(continued)

Field

Description