Reference Guide

Zend Server Reference Manual
Possible Causes and Solutions:
Queries to a DB (database) - long, elaborate and complicated DB queries may take a long time and
make the function appear to take a long time to execute.
There are many ways to speed up DB queries such as:
422
Revise the SQL query itself - make it simpler
Improve the structure of your DB tables
Use RDBMS features that can improve speed such as indexes, prepared statements, stored
procedures etc…
All these are only suggested possible causes and each event. Developers have to analyze each
occurrence to understand the specific reasons behind the slow execution time.
Long running actions - Some actions triggered by a function can, by definition take a long time.
Examples of long running actions can be using a function to run code from the command line or remote
access queries with Web services or searching for files in a directory. In most cases, these uses of a
function cannot be refined and the best action is to ignore these issues when they occur.
False Positives - Sometimes functions run slowly. Not all functions that run slowly are indicative of a
problem in your code or environment and they may be no indication of unacceptable behavior. If this is
the case, remove the function from the Rule’s “Watched Functions” list or set issues triggered by this
function to ignored.