Resource management reseller under Cloudlinux

At the level of your reseller account, you can and must visualize the resources in real time of the accounts: by WHM at the bottom section plugins: LVE manager
Allows global management of resources used by reseller accounts, by packages, and by user, etc.
  In addition, you will receive each 24H direct notifications of the server with title: Hosting account resources exceeded, a global reseller, another summary on the accounts having touched limits, and another individual by account, read the good, and ignore if nothing repeated or continuous.
- in some types of notifications, you will not receive anything if there is nothing to report
- this notification is done by 12-24H, it can be programmed more often, see, and not after a problem is detected a priori, so it is not perfect for a quick reaction.
Detailed explanations
Paragraph 1: at our level, for information
Here is for a reseller account at our level the broad limits that we have entered and that will affect your entire account in an aggregated way, therefore not individual to a cPanel account.
For the moment, we do not prefer to enter a memory limit (theoretical 16GB for start 1) to avoid any problems with cPanel accounts.

Ci-dessous, voici les limites actuelles par défaut d'un compte cPanel (liées à intrinsèquement aux limites globales ci-dessus du compte revendeur)
SPEED = Processeur = 160% soit 1.6 coeur
You could make your own default config, see point 3 of paragraph 2
Some accounts still have the old limits of 130%, you can modify this one by the package to adjust them to the new default above, or to the level of the resources of the default account, knowing that it is not necessarily retro-active , check after changes and a few minutes the time it spreads ...
Paragraphe 2 : A votre niveau 
Point 1
From your WHM, you will be able to view the existing default resources defined at the level of the accounts, but also their use in real time. Go to your WHM access, Plugins section, then LVE manager.
It gives you this below, put an auto-refresh of 5 seconds, click on SPEED / ex to sort by use processor
PNO gathers simultaneous connections, and PHP processes, it is not limited
Point 2
Tab Historical usage
This is the overall use of your account
And at the bottom, the top 5 users, with the possibility to see the historical graph by right-clicking on the underlined icon in blue
Change the observed period, and look especially at the bottom of the graph faults
Tab Statistics
This is another view that allows an efficient way to look for faults, A for average, F for Faults
Point 3
It is recommended not to touch them because it represents a good compromise between the power of an account in proportion to your total reseller resource and not to penalize the other accounts in the case where an account would have a bug having its processor blocked to its ceiling during 24H
These are the default resources for creating a new package, and accounts that will be below :
This default setting is yours, you can modify it (not recommended), you will be able to make a small package to which you will modify its resources then : 
SPEED: it is the processor, not recommended below 0.5 heart, syntax: 50%
PMEM: it is the physical memory, not recommended below 512MB, syntax: 512M
IO: it's disk writing, not recommended to touch it
IOPS: these are the number of disk operations per second: read or write disk, not recommended to touch it
EP: the number of simultaneous PHP processes, the touch is forbidden because too delicate
NPROC: Virtual process in unlimited value, the touch is forbidden because too delicate
INODES SOFT: number of files in unlimited value, the touch is forbidden because too delicate
INODES HARD: number of files in unlimited value, the touch is forbidden because too delicate
The Users tab also allows you to modify the resources of a cPanel account, which then takes precedence over the settings of the package
The Tab packages allows you to manage the resources allocated to a package
Note that it is retroactive on what already exists, and will take several minutes to update at the level of Package Users ...
Point 4
Tab Options
These are notification notifications: What, When, we recommend not touching until you understand what it is, and wait for some time...
It is possible that this one causes you a duplicate in the case where the contact email registered in the cPanel account is yours, and not that of a customer, if the case to turn it off
If you do not want to notify the customer anyway if it's his contact email: disable, otherwise change the contact emai of the cPanel account