ISPmanager 6 Business Documentation

CloudLinux limits


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

Cloud hostingHigh-end hosting
Maximum CPU100%200%
Physical memory512 MB1 GB
Total number of read/write operations1024 KB/s4096 KB/s
Number of processes within LVE2040
 Entry processes100100

MySQL Governor

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:

  • Maximum CPU;
  • Maximum disk I/O.

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