Performance Analysis and Tuning
for AIX 5.2+
SarCheck for AIX
SarCheck is a Linux & UNIX performance analysis and performance tuning tool. It is designed to help you with performance management on most Oracle Solaris, Linux, AIX, and HP-UX systems by making recommendations and explaining them with plain text, supporting graphs, and tables.
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How SarCheck for AIX Makes a Difference

If you've had trouble understanding how to tune your AIX system using minperm, maxfree, maxclient, or any of the other tunable kernel parameters in ioo, schedo, or vmo, you need SarCheck! SarCheck analyzes your AIX system or LPAR for possible performance bottlenecks and tells you how to correct them. Most performance tools such as HP's Glance are actually resource monitors. They're good tools which provide useful statistics about the utilization various system resources in a variety of numeric and graphical formats but aside from providing some basic monitoring, they leave most of the analysis and interpretation up to you. SarCheck was first released for SCO UNIX in February 1995 and we have been improving it continuously since then and porting it to other more popular flavors of UNIX.

There are a number of interesting things that we're looking at. For example, we compare the percentage of pinned pages to maxpin and graph it if your system has gnuplot and a browser. We look at the different tunable parameters used by JFS and JFS2 filesystems. We look at the rate of paging to the paging spaces together with the usage of that paging (or swap) space. We also use the newer sar -u metrics of physc and %entc when they're present. And much more. If you're running AIX 5.3 or newer on recent hardware (POWER5+) and you're not sure what these are, SarCheck will help explain them to you.

We use tuning algorithms based partially on the latest information from IBM. If you don't know how to use the lru_file_repage and lru_poll_interval parameters and how to set maxclient and maxperm when you use them, you owe it to yourself to see what SarCheck recommends for your system.

SarCheck takes performance tuning beyond the others. Instead of just re-reporting system data and statistics, SarCheck analyzes the output of the sar utility, and examines the system's tunable parameters and their interaction with each other. Then in a concise, plain English report, SarCheck identifies problem areas and makes recommendations about how to correct them. SarCheck does not actually monitor your system's resources like CPUs, disks, memory, and the values of tunable parameters. It leaves that up to sar, ps, vmo, ioo, schedo, and lsattr, which are included with the operating system.

To maintain peak efficiency, use SarCheck regularly and watch how its recommendations change when you add more users, upgrade the processor or add processors, increase memory, add software, or whenever you detect a change in system performance. SarCheck requires a few megabytes of disk space and typically uses only a few seconds of CPU time per day!

Learn more:

View a sample report: SarCheck v7 for AIX

More information:

PDF Manual for SarCheck Version 7
PDF Manual - SarCheck v7 Switches
PDF Manual - SarCheck v7 Parms
General release & recent enhancements
SarCheck data sheets
News from Tech Support and FAQ
SarCheck home page

Here are 3 of the top 50 reasons why our customers say they continue to choose SarCheck:

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