Unusual high CPU cycles on iRule
Hi, So I am using the following iRule on all virtual servers & just enabled timing on this: priority 50 when RULE_INIT { set static::maindatalist set static::debug 0 } when HTTP_REQUEST { return the company logo from ifile if { ([HTTP::uri] eq "/bip-company-logo.gif") }{ HTTP::respond 200 content [ifile get /Common/company-logo] return } set vs [virtual name] if {($static::debug == 1)}{ log local0. "VS is $vs, looking at $static::maindatalist" } set status [class match -value "[virtual name]" equals "maintenance-list"] if {($static::debug == 1)}{ log local0. "Looked up status: $status" } if { ($status eq "1") } { if { ([HTTP::uri] eq "/favicon.ico") }{ HTTP::respond 404 content "" return } set contact "Application Support () or your Regional Helpdesk" if {([virtual name] starts_with "/ITSS/")}{ set contact "your Regional Helpdesk" } if {($static::debug == 1)}{ log local0. "Showing maintenance page" } HTTP::respond 200 content " Down for maintenance - company Maintenance This application is currently undergoing maintenance. It should be available again within the specified time period. For any questions, please contact $contact. " Connection Close return } } when LB_FAILED { set contact "Application Support () or your Regional Helpdesk" if {([virtual name] starts_with "/ITSS/")}{ set contact "your Regional Helpdesk" } HTTP::respond 503 content " Application Unavailable - company Application unavailable This application is currently not available. Please contact $contact. " Connection Close return } (378 requests) RULE_INIT: 5900 min, 12300 avg, 12300 max LB_FAILED: 46000 min, 60200 avg, 167000 max HTTP_REQUEST: 21300 min, 44000 avg, 384900 max I used the F5DevCentral_iRulesRuntimeCalculator to calculate the CPU usage, coming down to 28% max CPU usage per request. This seems VERY high. Is there anything I can do about this? I tested with a healthy node & a disabled node, no maintenance mode.