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Operating Systems Linux Red Hat What would cause high kernel/system utilisation Post 302223756 by azurty on Monday 11th of August 2008 10:01:16 AM
Old 08-11-2008
What would cause high kernel/system utilisation

We have a VM running RedHat that seems to have very high system (kernel) utilisation compared to our physical servers running the same OS and workload that show normal system time utilisation.

Any ideas?

Thanks in advance.
 

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mk_kernel(1M)															     mk_kernel(1M)

NAME
mk_kernel - load a kernel configuration from a system file SYNOPSIS
path_name] system_file] DESCRIPTION
reads configuration information from the system file (see system(4)) and applies those changes to a kernel configuration (see kconfig(5)). performs a function similar to that of but has some semantic differences in order to preserve compatibility with previous releases. will build a new kernel executable only if needed to effect the requested changes. may reuse existing kernel executables when possible. Options recognizes the following options. Specify the target kernel path. If the target kernel path specified is changes are applied to the currently running kernel configuration. They will take effect immediately if possible; otherwise, they will take effect at next boot. If the target kernel path specified is of the form changes are applied to the saved kernel configuration named config. The changes will not take effect at next boot unless that saved kernel configuration was already marked for use at next boot. If the target kernel name is a single word containing no slashes, that name is used as the name of a saved kernel configuration. The changes are applied to that saved kernel configuration. The changes will not take effect at next boot unless that saved ker- nel configuration was already marked for use at next boot. If the target kernel path is not one of the forms specified above, then exits with an error. Other locations for kernel exe- cutable files are no longer supported. If the option is not specified, the changes are applied to the kernel configuration called The changes will not take effect at next boot unless that kernel configuration was already marked for use at next boot. Specify the HP-UX system description file. If this option is not specified, the system file is used. For details see system(4). Verbose mode. (Has no effect; retained for backward compatibility.) RETURN VALUE
returns 0 upon normal completion; it returns 1 if an error occurred. DIAGNOSTICS
Messages and warnings are sent to Messages from and other commands are displayed when invoked from Errors cause to halt immediately; warn- ings allow the program to continue. EXAMPLES
Uses the default HP-UX system description file The changes are applied to the currently running kernel configuration, marked to take effect at next boot. Uses the system description file Uses the system description file The changes are applied to the saved kernel configuration called WARNINGS
Do not manually modify the contents of the kernel configuration directories. FILES
Default HP-UX system description file SEE ALSO
kconfig(1M), system(4), kconfig(5). mk_kernel(1M)
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