TMM utilization increaseing after iRule change

Hi Andrea,

 

It's hard to tell what is happening here with the difference. One hand you are using a "contains" which may be increasing the CPU cycles because it's looking at the entire URI. Is it possible to post the original?

 

 

There is also an article about evaluating Irule performance that you can look at. The following link will take you to an excellent article about measuring optimization.

 

 

http://devcentral.f5.com/Tutorials/TechTips/tabid/63/articleType/ArticleView/articleId/123/iRules-Optimization-101--05--Evaluating-iRule-Performance.aspx

 

 

I hope this helps

 

 

Bhattman

 

 

Hi Bhattman

 

 

I don't know how to post it as a code here in this forum.

 

I just paste the rule code into notepad and then into here.

 

 

 

here is the rule:

 

 

 

when HTTP_REQUEST {

 

 

 

don't run the rule if it's a mobile redirect

 

if {[info exists mobile_match] && $mobile_match==1} {

 

log local0. "It's a mobile client: [IP::client_addr]"

 

} else {

 

log local0. "normal client: [IP::client_addr]"

 

 

 

set rule_active 1

 

set default_category 1

 

set uri_orig [string tolower [HTTP::uri]]

 

 

set uri_prefix_category "/default/defaultcatg.asp?rewrite=1&catg="

 

set uri_prefix_listing "/default/defaultlist.asp?rewrite=1&catg="

 

set uri_prefix_carsandbikes_listing "/carsandbikes/defaultlist.aspx?rewrite=1&categorynr="

 

 

Required params

 

set para_c [findstr $uri_orig "/c/" ]

 

set para_l [findstr $uri_orig "/l/" ]

 

set para_b [findstr $uri_orig "/b/" ]

 

 

 

if { $para_c ne "" } {

 

set parameters [findstr $para_c "/c/" 2]

 

log local0. "Parameter para_c: $para_c $parameters"

 

} elseif { $para_l ne "" } {

 

set parameters [findstr $para_l "/l/" 2]

 

log local0. "Parameter para_l: $para_l $parameters"

 

} elseif { $para_b ne "" } {

 

set parameters [findstr $para_b "/b/" 2]

 

log local0. "Parameter para_b: $para_b $parameters"

 

} else {

 

set parameters ""

 

}

 

 

log local0. "Parameters: $parameters"

 

 

 

Optional params

 

set para_cn [findstr $parameters "/cn" 3 "/"]

 

set para_an [findstr $parameters "/an" 3 "/"]

 

set para_ln [findstr $parameters "/ln" 3 "/"]

 

set para_ls [findstr $parameters "/ls" 3 "/"]

 

set para_lt [findstr $parameters "/lt" 3 "/"]

 

set para_pn [findstr $parameters "/pn" 3 "/"]

 

set para_ps [findstr $parameters "/ps" 3 "/"]

 

set para_xml [findstr $parameters "/xml" 4 "/"]

 

 

 

log local0. "Parameter para_an: $para_an"

 

 

switch -exact $uri_orig {

 

"/kaufen" -

 

"/acheter" -

 

"/kobe" -

 

"/kjope" -

 

"/pris" -

 

"/angebote" -

 

"/buy" {

 

HTTP::respond 301 Location http://[HTTP::host][HTTP::uri]/

 

}

 

}

 

switch -glob $uri_orig {

 

"/kaufen/*" -

 

"/acheter/*" -

 

"/kobe/*" -

 

"/kjope/*" -

 

"/pris/*" -

 

"/angebote/*" -

 

"/buy/*" {

 

 

Process required parameters

 

Set the correct categorynumber

 

if { $para_cn equals "" } {

 

set para_cn $default_category

 

} else {

 

do nothing

 

}

 

Set the article number

 

if { $para_an != "" } {

 

Add auctionnr to the URI

 

set para_an "&auctionnr=$para_an"

 

}

 

 

Workaround for "v" and "w" else Default new_uri

 

if { "$uri_orig" contains "/v/" or "$uri_orig" contains "/w/" } {

 

set rule_active 0

 

log local0. "rule_active: none"

 

} else {

 

set uri_new $uri_prefix_category$para_cn

 

}

 

 

Process URI prefix

 

Create URI prefix for listing page

 

if { $para_l != "" } {

 

set uri_new $uri_prefix_listing$para_cn

 

} elseif { $para_b != "" } {

 

set uri_new $uri_prefix_carsandbikes_listing$para_cn

 

} else {

 

set uri_new $uri_prefix_category$para_cn

 

}

 

 

 

Process optional parameters

 

if { $para_ln != "" } {

 

Add langeuagenr to the URI

 

set uri_new "$uri_new&languagenr=$para_ln"

 

}

 

if { $para_ls != "" } {

 

Add listingsort to the URI

 

set uri_new "$uri_new&listingsort=$para_ls"

 

}

 

if { $para_lt != "" } {

 

Add listingtype to the URI

 

set uri_new "$uri_new&listingtype=$para_lt"

 

}

 

if { $para_pn != "" } {

 

Add pagenumber to the URI

 

set uri_new "$uri_new&pagenr=$para_pn"

 

}

 

if { $para_ps != "" } {

 

Add pagesize to the URI

 

set uri_new "$uri_new&pagesize=$para_ps"

 

}

 

if { $para_xml != "" } {

 

Add xml to the URI

 

set uri_new "$uri_new&xml=$para_xml"

 

}

 

 

 

Set new URL

 

log local0. "[HTTP::host] $uri_orig $uri_new"

 

if { $rule_active ne 0 } {

 

if {[catch { HTTP::header insert "X-REWRITTENURL [HTTP::uri]" } result]} {

 

log local0. "[HTTP::host] [IP::client_addr]:[TCP::local_port] Error on Header Insert X-REWRITTENURL"

 

}

 

if { [HTTP::uri] equals $uri_new } {

 

log local0. "[HTTP::uri] URLs equal!"

 

}

 

HTTP::uri $uri_new

 

log local0. "[HTTP::host] [HTTP::uri] -> $uri_new"

 

}

 

 

}

 

}

 

}

 

}

 

 

 

 

 

 

Thanx for help

 

 

 

Hi Bahttman

 

 

I did activate the timing:

 

 

 

b rule irule_global_rewrite_buy_page_new show all

 

RULE irule_global_rewrite_buy_page_new

 

+-> HTTP_REQUEST 1424 total 0 fail 0 abort

 

| Cycles (min, avg, max) = (523003, 640003, 2456714)

 

 

 

 

 

 

I cannot massure if it's a problem or if these stats normal.

 

 

 

 

 

thanx

 

andrea

 

Hi Andrea,

 

The timing is to specifically to help you change your code to reduce the CPU cycles - it wasn't design to poinpoint where the in the code it took up the CPU cycles. However, this should help you choose the best way to optimize your code.

 

 

Bhattman

You can edit your post and use [ code ] [/ code ] tags to preserve the spacing.

 

 

Do you have another iRule on the virtual server which could be preventing CMP? That could explain high CPU0 usage. See this article for details:

 

http://devcentral.f5.com/wiki/default.aspx/iRules/CMPCompatibility.html

 

 

Are you logging for every connection? If so, you might try commenting out all of the logging.

 

 

You could also put add the 'return' command after each HTTP::respond/redirect to exit the current event in the current iRule:

 

http://devcentral.f5.com/wiki/default.aspx/iRules/return

 

 

Aaron