Table of Contents

Troubleshooting

Too slow, how to make my site faster?

My site running slow, how to make it faster?How to improve my site performance?

My server load is high, how to resolve it?

My server load is high, how to resolve it?How to resolve my server load issue?

How to fix PHP 503 errors?

Troubleshooting 503 ErrorsHow to fix PHP 503 errors?

Understanding 500 error

Understanding 500 errorWhat is 500 internal server error and how to fix it?

How to fix 404 error?

Understanding 404 errorWhat is 404 Not Found error and how to fix it?

How to fix 403 error?

Understanding 403 errorWhat may cause 403 error?

Common errors

Site reached its capacity limitWhat's wrong with it?
"File permission is restricted for script" error How to fix script restriction error
"Can not find External Application: lsphp55" Server error:can not find lsphp55 external app after the installation, how to fix it?
"Site Reached Its Capacity Limit!"How to fix a “Site reached its capacity limit!” error in CloudLinux
LiteMage Cache TroubleshootingHow to troubleshoot LiteMage Full Page Cache
Child process killed, is that normal?How to deal with “Child Process Killed” message in stderr.log
LSWS Admin Panel UnavailableMy LSWS admin panel unavailable, how to fix it?
"Too many bad requests, block"How to fix “Status 400: Bad request method” error?
Handle "Access to context [/] is denied"Troubleshoot “[ACL] Access to context [/] is denied!” error
Directive 'suPHP_UserGroup' is not allowed in current contextHow to fix error“Directive 'suPHP_UserGroup' is not allowed in current context.”
systemd Status Incorrectly Shows InactiveHow to fix when LSWS is actually running
Common errorsUnderstanding some common errors and how to fix them?

Debugging

Bug ReportingHow to file a LiteSpeed bug report
Toggle Debug LoggingA feature for quickly switching between normal and very detailed log levels
How to Enable Rewrite LoggingThe first step in debugging rewrite rules
How to Debug my Rewrite RuleThe steps to check the failed rewrite rule

Advanced troubleshooting

Strace PHP processDiagnosing Performance Issues: Using strace with PHP
Check files openned by a ProcessUse lsof to trace open files