Q: How often are browser versions updated?
A: The high frequency of browser releases make it impractical to implement every single release of every browser. But the goal is to proactively keep up with all major changes (protocols, performance updates and standards) in all supported browsers. This usually means implementation of new browsers every 6-12 months.
Q: Why is the total response time different from the waterfall chart?
A: The total response time shows the combined time it takes for the browser to load the sites different elements in parallel. The waterfall chart shows how long time each URL takes to load. If you add those times together you get the time it takes to load the entire site sequentially, which is why the times differ.
A: In Tools -> Maintenance (http://wpm.apicasystem.com/Maintenance) you can remove or update your check result severity. You can sort/filter the checks by type, severity, time periods or directly select a specific check from the drop-down menu.
A: In Tools - > API you will find basic documentation on how to authenticate users to the API. You will also find links to more in-depth documentation (http://api-wpm.apicasystem.com/v3/help). It’s worth noting that the user you authenticate must have permission to see the checks in Apica Synthetic(former WPM) for them to return any values to the API.
A: Make sure that your user has the right permissions. To add a user to groups go to (http://wpm.apicasystem.com/ManageChecksNew) and click Edit users and add the desired users to the desired group.
A: There is a field on the checks settings page named Schedule. In this field you define your Exclusions periods using the syntax described below. You will also find this description for the syntax if you click the question mark next to the field.
Exclusion period syntax
Syntax: PERIOD [ ; PERIOD ]
PERIOD ::= ( WEEK-DAY-LIST | MONTH-DAY-LIST | DATE-LIST ) : TIME-RANGE
WEEK-DAY-LIST ::= WEEK-DAY-SPEC [ , WEEK-DAY-LIST ]*
WEEK-DAY-SPEC ::= ( WEEK-DAY | WEEK-DAY-RANGE )
WEEK-DAY-RANGE ::= WEEK-DAY - WEEK-DAY
WEEK-DAY ::= ( mon | tue | wed | thu | fri | sat | sun )
MONTH-DAY-LIST ::= MONTH-DAY-SPEC [ , MONTH-DAY-LIST ]*
MONTH-DAY-SPEC ::= ( MONTH-DAY | MONTH-DAY-RANGE )
MONTH-DAY-RANGE::= MONTH-DAY - MONTH-DAY
MONTH-DAY ::= 0-31 (Note: Month day 0 means last day of month)
DATE-LIST ::= DATE-SPEC [ , DATE-LIST ]*
DATE-SPEC ::= ( DATE | DATE-RANGE )
DATE-RANGE ::= DATE - DATE
DATE ::= [yy]yy-mm-dd
TIME-RANGE ::= TIME-SPEC - TIME-SPEC
TIME-SPEC ::= hh[:mm[:ss]]
mon-fri : 21:30-22; sun:15-17; 0-1:12-18; 2012-04-01-2012-04-30:18-23
which specifies four periods:
The 1st means "every monday to friday between 21:30 and 22:00".
The 2nd means "sundays between 15:00 and 17:00".
The 3rd means "the last and first day of each month, between noon and 18".
The 4th means "between 18:00 and 23:00 on each day of April 2012".
A: Informational: This means that the check is working as intended. You will get this alert, if a check has had another state and returned to normal.
Warning/Error: These alerts are set manually in the settings and are latency alerts; if the response time for the checks exceeds the set values, they will trigger.
Fatal: The check fails.
Q: Why am I not getting an alert saying the check has return to normal state, I got an error/warning/fatal alert, but I can see in the control panel that the check has returned to normal state?
A: If you haven’t setup in you alert that you should get informational alerts, you will not get at an alert saying that the check has returned to normal.
A: You setup checks through the wizard “New Check”.
A: Go to “Manage Alerts” and click the bullseye next to the check you wish to have alerts for. Select the severity that should trigger the alert, and the user that should receive the alerts.
A: Go to “Users” and click “New user”.
Q: Is it possible to get alerts only on certain time periods?
A: No. But you can set the check to run only on certain time periods.
Q: How is SLA calculated?
A: More information about SLA calculation can be found here.
Q: Can you explain how a browser renders a page?
A: Please read this article.