Administering Platform LSF - SAS

Chapter 8
Understanding Resources
Status
unavail
unlicensed
Description
The host is down or the LIM on the host is not running or is not
responding.
The host does not have a valid license.
CPU run queue lengths (r15s, r1m, r15m)
The r15s, r1m and r15m load indices are the 15-second, 1-minute and 15-
minute average CPU run queue lengths. This is the average number of
processes ready to use the CPU during the given interval.
On UNIX, run queue length indices are not necessarily the same as the load
averages printed by the uptime(1) command; uptime load averages on some
platforms also include processes that are in short-term wait states (such as
paging or disk I/O).
Effective run
queue length
Normalized run
queue length
On multiprocessor systems, more than one process can execute at a time. LSF
scales the run queue value on multiprocessor systems to make the CPU load
of uniprocessors and multiprocessors comparable. The scaled value is called
the effective run queue length.
Use lsload -E to view the effective run queue length.
LSF also adjusts the CPU run queue based on the relative speeds of the
processors (the CPU factor). The normalized run queue length is adjusted for
both number of processors and CPU speed. The host with the lowest
normalized run queue length will run a CPU-intensive job the fastest.
Use lsload -N to view the normalized CPU run queue lengths.
CPU utilization (ut)
Paging rate (pg)
Login sessions (ls)
The ut index measures CPU utilization, which is the percentage of time spent
running system and user code. A host with no process running has a ut value
of 0 percent; a host on which the CPU is completely loaded has a ut of 100
percent.
The pg index gives the virtual memory paging rate in pages per second. This
index is closely tied to the amount of available RAM memory and the total size
of the processes running on a host; if there is not enough RAM to satisfy all
processes, the paging rate will be high. Paging rate is a good measure of how
a machine will respond to interactive use; a machine that is paging heavily
feels very slow.
The ls index gives the number of users logged in. Each user is counted once,
no matter how many times they have logged into the host.
Administering Platform LSF 145