CloudLinux limits
CloudLinux allows restricting customers who use too much resources. You can set the limits in Cluster settings → CloudLinux limits.
LVE
Note:
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.
Details
CloudLinux recommendations for LVE limits
| Cloud hosting | High-end hosting | |
|---|---|---|
| Maximum CPU | 100% | 200% |
| Physical memory | 512 MB | 1 GB |
| Total number of read/write operations | 1024 KB/s | 4096 KB/s |
| Number of processes within LVE | 20 | 40 |
| Entry processes | 100 | 100 |
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% corresponds to the full load of all cores, 50% — to the full load of half of the cores, 25% — to the full load of 25% of the cores, etc.
- 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.