Difference between revisions of "Different kernel flavors (UP, SMP, ENTERPRISE, ENTNOSPLIT)"
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The version of a kernel you need depends on your server hardware. | The version of a kernel you need depends on your server hardware. | ||
| + | |||
The table below describes the cases when it is better to use each of these kernels: | The table below describes the cases when it is better to use each of these kernels: | ||
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| >20-30 VPSs | | >20-30 VPSs | ||
|} | |} | ||
| + | |||
These kernels are optimized for these types of hardware configurations and usage scenarios, | These kernels are optimized for these types of hardware configurations and usage scenarios, | ||
| − | so choosing the right kernel can | + | so choosing the right kernel can help performance for 5-15%. |
Use 'rpm -ihv' command for ovzkernel RPM installation. Please do not use the "rpm -Uhv" command to install the kernel, | Use 'rpm -ihv' command for ovzkernel RPM installation. Please do not use the "rpm -Uhv" command to install the kernel, | ||
otherwise all the previously installed kernels may be removed from your system. | otherwise all the previously installed kernels may be removed from your system. | ||
Revision as of 11:10, 1 June 2006
The version of a kernel you need depends on your server hardware.
The table below describes the cases when it is better to use each of these kernels:
| Kernel type | Hardware | Use case |
|---|---|---|
| UP (uniprocessor) | up to 4GB of RAM | - |
| SMP (symmetric multiprocessor) | up to 4 GB of RAM | 10-20 VPSs |
| entnosplit (SMP + PAE support) | up to 64 GB of RAM | 10-30 VPSs |
| enterprise (SMP + PAE support + 4/4GB split) | up to 64 GB of RAM | >20-30 VPSs |
These kernels are optimized for these types of hardware configurations and usage scenarios,
so choosing the right kernel can help performance for 5-15%.
Use 'rpm -ihv' command for ovzkernel RPM installation. Please do not use the "rpm -Uhv" command to install the kernel, otherwise all the previously installed kernels may be removed from your system.
