HP-UX Reference (11i v2 04/09) - 2 System Calls (vol 5)

settune_txn(2) settune_txn(2)

[EINVAL] The combination of ﬂags speciﬁed is invalid.

[EINVAL] The number of elements speciﬁed is zero.

[EINVAL] The size of a

ktune_context

structure as speciﬁed by struct_size is invalid.

[EINVAL] The number of elements speciﬁed is greater than the number of tunables available.

[EFAULT] err_buf or err_bufsize speciﬁes an address that is inaccessible.

[EIO] The Kernel Registry Service was either unavailable or encountered an error.

[ENOMEM] Insufﬁcient memory to accommodate the changes within the transaction.

WARNING

The caller must have super-user permissions to use this call.

It is possible to seriously degrade system performance, or even render a system unbootable, with incorrect

tunable settings. Use care when setting tunable values. Always have a known working kernel

conﬁguration saved as a backup; if the system fails to boot after a tunable change, boot from that backup

kernel conﬁguration. Keep good records of all tunable changes so that they can be reversed if they

degrade system performance. (Tunable changes made with

settune_txn()

are automatically logged

syslog.)

AUTHOR

settune_txn() was developed by Hewlett-Packard Company.