LVE limits default values and recommended values

Issue

What are the LVE default limits, and the recommended limits?

Environment

• CloudLinux OS
• LVE

Solution

Default Values

CloudLinux OS has support for the following limits:

Limits	Units	Default Value	Description	Supported Kernels / OS
SPEED	% of a core, or HZ	100%	CPU speed limit, relative to a single core, or specified in HZ (portable across CPU s)	all
CPU [deprecated]	% of CPU	25%	CPU Limit (smallest of CPU & NCPU is used)	all
NCPU [deprecated]	number of cores	1 CORE	Max number of cores (smallest of CPU & NCPU used)	all
PMEM	KB	1024MB	Physical memory limit (RSS field in ps/RES in top). Also includes shared memory and disk cache	all
VMEM	KB	0	Virtual memory limit (VSZ field in ps/VIRT in top)	all
IO	KB/sec	1024KB/sec	IO throughput - combines both read & write operations	CL8, CL7, CL6 lve1.1.9+ kernel
IOPS [lve1.3+]	Operations per second	1024	Restricts total number of read/write operations per second.	all
NPROC	number	100	Max number of processes within LVE	all
EP	number	20	Limit on entry processes. Usually represents max number of concurrent connections to apache dynamic scripts as well as SSH and cron jobs running simultaneously.	all

Note

It is always better to disable VMEM limits (set them to 0) in your system at all because they are deprecated and are causing unexpected issues.

Recommended Values

Bellow you can find recommendations for your typical shared hosting setup. The recommendations don't depend on the power of your server. They only depend on how "fast" you want your hosting accounts to be.

Typical Hosting Account

• SPEED=100%
• PMEM=512MB
• VMEM=0
• IO=1024KB/s
• IOPS=1024
• NPROC=100
• EP=20

High End Hosting Account

• SPEED=200%
• PMEM=1GB
• VMEM=0
• IO=4096KB/s
• IOPS=1024
• NPROC=100
• EP=40

Useful links

https://docs.cloudlinux.com/shared/limits/#limits

https://docs.cloudlinux.com/shared/cloudlinux_os_components/#mysql-governor-limits

https://docs.cloudlinux.com/shared/limits/#best-practice