CloudLinux

Got a CloudLinux "resource limits reached" email? What it means

What the CloudLinux email about reaching CPU, memory, IO or entry process limits means, how to read it, whether to worry, and what to do to stop the faults.

BeginnercPanel hosting with CloudLinux2 min read

CloudLinux can email the account owner when a hosting account repeatedly hits its CPU, memory, IO or process limits. The message lists the limits and how many faults happened. It does not mean your site is broken, but it is a useful early warning.

Before you start

  • The email, including the time period and limits listed.
  • cPanel access to check details.

How to read the email

Item in the emailMeaning
Speed / CPU faultsThe site was slowed because it used its full CPU share
Physical memory faultsRequests failed or were stopped because memory was full
IO / IOPS faultsDisk-heavy tasks were throttled
Entry processes faultsVisitors may have seen 508 errors
Number of processes faultsToo many processes at once, including cron

Each limit is explained in more depth in CloudLinux limits explained.

Should you worry?

  • A few faults during a traffic spike: normal; the limits did their job.
  • Faults every day or every hour: visitors are affected; act now.
  • Faults at the same time every night: probably a backup or scheduled task.

Find the cause

  1. Open cPanel → Metrics → Resource Usage → Details and match the fault times (see reading Resource Usage).
  2. Check the access log for bots or attacks at those times.
  3. Think about what ran then: imports, backups, newsletter sends, cron jobs.

Fix it

  • Entry processes: enable LiteSpeed Cache and block bad bots (see 508 errors).
  • Memory: reduce plugins, avoid huge memory_limit values (see memory limit errors).
  • IO: lighten backups and imports (see IO limits).
  • Everything at once: the site may simply be busy; upgrade the plan.

Tip: Fix one thing, then wait a few days for the next email or check Resource Usage. If faults drop, you found the cause.

Stop the emails

Emails go to the account's contact address. You can change that address in cPanel → Preferences → Contact Information, but it is better to fix the cause than to silence the warning.

Frequently asked questions

Is this email spam or phishing?

Genuine notices come from your server and contain no login links asking for passwords. If unsure, check Resource Usage in cPanel directly.

Do resellers get these emails?

Resellers may receive summaries for their customers, depending on server settings, and can check usage in WHM.

Will my site be suspended for faults?

No. Faults mean the limits are working. Suspension is only for abuse, not for a site reaching its limits.

Why did I get the email when the site seemed fine?

Short spikes may not be visible to you but still reach limits. Check the times in Resource Usage; visitors at those moments may have had slower pages.

Can my reseller raise my limits?

Yes, within their own plan. Ask them with the fault details from Resource Usage.

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