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28 Cards in this Set

  • Front
  • Back
what are the 3 types of work loads?
1. workstation
2. multiuser
3. server
nice and renice.
The nice and renice commands are used to change the priority of a process.
The nice command runs another command at a different priority, while the
renice command changes the priority of an already running process.
Sets parameters for CPU scheduler and Virtual Memory Manager
Captures and analyzes a snapshot of virtual memory.
time Prints the elapsed execution time and the user and system
processing time attributed to a command.
Displays information about a logical volume or the logical volume
allocations of a physical volume.
The tprof command can be used over a time period to trace the activity of the
Reorganizes the physical-partition allocation within a volume group.
The schedtune command allows you to modify the default behavior of the
scheduling system for threads and processes, and should be used with extreme
care by experienced administrators.
Displays the status of processes.
what does the vmstat command do?
The vmstat command reports statistics about kernel threads, virtual memory,
disks, traps, and CPU activity.
Collects and reports or records system-activity information.
Reports CPU usage for individual programs and the whole system.
Changes the priority of one or more processes.
Runs a command at higher- or lower-than-normal priority.
no Displays or sets network options.
The sar command writes to standard output the contents of selected cumulative
activity counters in the operating system.
memory bound?
A system is memory-bound if some virtual memory is forced
out to disk, meaning the system is waiting on a relatively slow
disk instead of relatively fast RAM. This is indicated by a
non-zero value in the page-in (pi) and page-out (po) values.
Displays the attributes of devices.
Reports CPU and I/O statistics.
Displays statistics about Network File System (NFS) and Remote
Procedure Call (RPC) activity.
what is the svmon command used for?
The svmon command provides a more in-depth analysis of memory usage. It is
more informative, but also more intrusive, than the vmstat commands.
Displays the contents of network-related data structures.
what is the netstat command used for?
The netstat command symbolically displays the contents of various
network-related data structures for active connections.
how is the iostat command used?
The iostat command is used for monitoring system input/output device loading
by observing the time the physical disks are active in relation to their average
transfer rates.
Records and reports selected system events.
Reports virtual-memory activity and other system statistics.
what is the wlm?
The Workload Manager (WLM) allows the system administrator to divide
resources between jobs.
cpu bound?
A system is said to be CPU-bound if the total system (sy) and
user (us) CPU usage is approaching 100 percent. This would
imply that idle time and wait time for CPU are approaching
what 2 reports does the iostat command generate?
The iostat command generates two types of reports, the tty and CPU Utilization
report and the Disk Utilization report.