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The UIM agent uses the sar utility (with the -u and -f options) to collect the metrics listed below from an IRIX system. The statistics returned by the agent are averaged for all CPUs on the system.
| Metric | Explanation |
|---|
| % Usr | Amount of time that the CPU spends in user mode. |
| % Sys | Amount of time that the kernel spends processing system calls. |
| % WHO | Amount of waiting time that a runable process for a device takes to perform an I/O operation. |
| Multi CPU Usage | Whether a system with multiple CPUs is effectively balancing tasks between CPUs, or if processes are being forced off CPUs in certain circumstances. |
| Run Queue Length | Percentage of time that one or more services or processes are waiting to be served by the CPU. |
| Run Queue Occupancy | Percentage of time that one or more services or processes are waiting to be served by the CPU. |
Multi-CPU
The UIM agent collects the metrics listed below from IRIX systems with multiple CPUs. The CPU statistics output by the agent are an average of all the CPUs on the server.
Me tricUs er The percentage | Percentage of CPU user processes that are in use. |
Sys tem The percentage | Percentage of CPU kernel processes that are in use. |
Wa it The percentage | Percentage of time that a process which can be run must wait for a device to perform an I/O operation. |
SM TXThe number | Number of read or write locks that a thread was not able to acquire on the first attempt, as reported by the mpstat command. |
XC ALThe number | Number of interprocess cross-calls. In a multi-processor environment, one processor sends cross-calls to another processor to get that processor to do work. Cross-calls can also be used to ensure consistency in virtual memory. Heavy file system activity such as NFS can result in a high number of cross-calls. |
Int errThe number Tot al | Number of CPU interrupts. |
upts | The total | Total amount of User %, System %, and Wait I/O%. |
Memory
The Uptime Infrastructure Monitor agent uses the sar utility with the following options to collect memory metrics from an IRIX system:
-w -f (swap activity)-b -f (buffer activity)-p -f (paging activity)
The statistics the agent returns are for the entire system.
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