Do you run CloudLinux, and what does it change for me

Yes, on every shared and WordPress server we run. In one sentence: your account is given a reserved share of the machine instead of drawing from a common pool.

The practical effect

Two things change, and only one of them is the one people expect.

The expected one: a stranger elsewhere on the hardware cannot take your speed away. Their account has a boundary and reaching it is their problem.

The unexpected one, which matters more once you own thirty sites: your own busiest site cannot take the others down either. Whichever of your accounts is running an import, rebuilding a search index or being crawled aggressively absorbs that on its own.

What comes with it

• A ceiling on processor, memory, simultaneous requests and disk activity, applied per account.
• Separate filesystems, so accounts cannot browse one another.
• A PHP version chosen per account rather than per server.

Two things it is not

It is not additional capacity. A reserved share is still a share, and a site that genuinely needs more than the plan allows will reach its boundary regardless of who the neighbours are.

It is not something search engines can observe. No crawler knows what your account runs inside. What it can observe is whether your pages answer at a consistent speed, and consistency is precisely what a reserved share buys.

Nor does it separate your sites from each other in public. That job belongs to the addresses, and every site here can take a distinct, non-consecutive one with private nameservers.

Seeing your own numbers

The panel reports both current consumption and how many times you have run into a boundary. The second figure is the one to trust when deciding whether anything is wrong, because a site can look busy and be perfectly healthy.

How much does it cost me?

Nothing extra. It is part of the platform on every shared and WordPress plan, not a line on the invoice.

Can I raise my own boundary?

Within a plan, the allowance is what the plan carries. Moving to a larger plan raises it. Beyond that the honest answer is that a workload demanding continuously more than shared hosting offers is a workload that wants hardware reserved to it.

Before assuming you are there, check the cheap explanations first. An uncached front page, an extension writing to the database on every visit, or a task firing every sixty seconds all produce the same appearance as a site that has outgrown its plan, and none of them cost anything to correct.

The long version, including how to plan a network around these boundaries, is in Platform and Limits. Vendor documentation is at docs.cloudlinux.com.