Issued:

2015-11-19

Updated:

2015-11-19

RHBA-2015:2375 - tuned bug fix and enhancement update

Synopsis

tuned bug fix and enhancement update

Type/Severity

Bug Fix Advisory

Topic

Updated tuned packages that fix several bugs and add various enhancements are now available for Red Hat Enterprise Linux 7.

Description

The tuned packages contain a daemon that tunes system settings dynamically. It does so by monitoring the usage of several system components periodically.

The tuned packages have been upgraded to upstream version 2.5.1, which provides a number of bug fixes and enhancements over the previous version. (BZ#1155052)

This update also fixes the following bug:

• Previously, the value of the vm.max_map_count sysctl settings was set too low (1,000,000) in the sap-netweaver tuned profile, which could affect performance. With this update, vm.max_map_count is set to 2,000,000, which is a value recommended by SAP documentation. (BZ#1228562)

In addition, this update adds the following enhancements:

• Previously, Tuned could run only as a daemon, which could affect performance of small systems because of its memory footprint. With this update, a no-daemon (one shot) mode, which does not require any resident memory, has been added into Tuned. The no-daemon mode is disabled by default because much of Tuned functionality is missing in this mode. (BZ#1068663)

• Previously, Tuned did not handle the Xen Virtual Shared Disks (XVSD), which are used for example in Amazon EC2 Red Hat Enterprise Linux instances. Support for XVSD has been added, and Tuned can now tune XVSD devices as expected. (BZ#1170152)

• The scheduler plug-in did not support tuning of newly created processes; it could only tune CPU affinity and real-time scheduling attributes of processes that existed when a Tuned profile was applied. The newly-created processes were not tuned until Tuned was restarted or the profile was reapplied. The plug-in now monitors also the newly-created processes and tunes those that match the settings in the Tuned profiles. (BZ#1148546)

• With this update, support for variables and built-in functions has been added to Tuned allowing for example dynamic calculation of the kernel boot command line in the bootloader plug-in. (BZ#1191595)

• This enhancement adds a Tuned profile for Oracle databases. The profile is based on the throughput-performance profile and additionally changes kernel parameters based on the requirements for the Oracle databases workload. (BZ#1196298)

• Previously, there was no way to verify that a Tuned profile was successfully applied and that the current system settings matched the settings requested in the profile. With this update, a new "verify" subcommand has been added to the "tuned-adm" command. Now, it is possible to verify whether the current system settings match the settings requested in a Tuned profile by running the "tuned-adm verify" command. In case that the system settings do not match, the command returns "1" and records to the Tuned log what was checked, what is the current value, and what is the expected value. (BZ#1212836)

Users of tuned are advised to upgrade to these updated packages, which fix these bugs and add these enhancements.

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

Updated Packages

• tuned-profiles-realtime-2.5.1-4.el7.noarch.rpm
• tuned-profiles-sap-hana-2.5.1-4.el7.noarch.rpm
• tuned-utils-systemtap-2.5.1-4.el7.noarch.rpm
• tuned-profiles-atomic-2.5.1-4.el7.noarch.rpm
• tuned-gtk-2.5.1-4.el7.noarch.rpm
• tuned-profiles-oracle-2.5.1-4.el7.noarch.rpm
• tuned-profiles-compat-2.5.1-4.el7.noarch.rpm
• tuned-2.5.1-4.el7.src.rpm
• tuned-2.5.1-4.el7.noarch.rpm
• tuned-profiles-sap-2.5.1-4.el7.noarch.rpm
• tuned-utils-2.5.1-4.el7.noarch.rpm

Fixes

• This content is not included.BZ - 1148546
• This content is not included.BZ - 1152539
• This content is not included.BZ - 1152541
• This content is not included.BZ - 1155052
• This content is not included.BZ - 1189263
• This content is not included.BZ - 1189868
• This content is not included.BZ - 1191775
• This content is not included.BZ - 1193682
• This content is not included.BZ - 1196298
• This content is not included.BZ - 1207668
• This content is not included.BZ - 1212831
• This content is not included.BZ - 1212836
• This content is not included.BZ - 1223864
• This content is not included.BZ - 1225124
• This content is not included.BZ - 1225135
• This content is not included.BZ - 1228801
• This content is not included.BZ - 1233004
• This content is not included.BZ - 1247184
• This content is not included.BZ - 1254538
• This content is not included.BZ - 1265654

CVEs

(none)

References

• http://www.redhat.com/security/updates/classification/#normal

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.