CloudLinux allows restricting customers who use too much resources. You can set the limits in Cluster settings → CloudLinux limits.
LVE limits apply only to Apache processes when executing PHP or CGI scripts. Dovecot/Exim processes are not subject to limits.
LVE limits will be applied to users if individual settings are not specified. You can set individual limits when adding or editing a user.
CPU load limit — in %. 100% indicates CPU speed relative to one core;
Total number of processes per user;
Physical memory — the maximum amount of physical memory that can be allocated to a user, in Mib. It includes shared memory used by the customer, as well as disk cache.
I/O limit — the maximum data throughput per user in Kbit/sec. It includes read and write operations;
LVE concurrent connections — the maximum number of entries into LVE per user.
The limits are specified in /etc/container/ve.cfg.
CloudLinux recommendations for LVE limits
Total number of read/write operations
Number of processes within LVE
You can set the limit for different periods: 1 sec, 15 sec, 1 min, 5 min, and 15 min. This allows a user to consume much system resources only during a short period of time, and forbids him doing so during a large period.
Enable MySQL Governor and set the following limits:
CPU — in %. 100% indicates CPU speed relative to one core.
Read — data read in MiB/sec. Cached reads are not counted.
Write — data written in MiB/sec. Cached writes are not counted.
When the customer exceeds the MySQL Governor limits, the LVE limits will be applied: