Viewing system information4–20
4.7.2 Overview of the information gathered by the collectl utility
The collectl utility gathers the following information for each individual server:
• Memory usage
• Total slab memory
• Total mapped memory
• Total buffer memory
• Total cache memory
• Total or Individual CPU utilization
CPU usage graphs are stacked; that is, each successive item is plotted with the value of the previous
item as its y-axis 0 co-ordinate.
•User percentage
• Wait percentage
• System percentage
•Nice percentage
• Context switches/Interrupts per second
• Total or Individual Disk Usage
• Megabytes read per second
• Megabytes written per second
• Lustre Statistics
• Total and Individual OST statistics
• Megabytes read per second
• Megabytes written per second
•MDS statistics
•Number of close operations per second
•Number of getattr operations per second
•Number of reint operations per second
This is a counter for all setattr, create, link, unlink, rename and open operations
that occur on the file system.
•Number of sync operations per second
This is a counter for the number of sync operations that are called on the file system.
• Total or Individual Network usage
• Megabytes received per second
• Megabytes sent per second
• Number of packets received per second
• Number of packets sent per second
• Process counters
• Number of new processes started per second
• Number of processes queued and waiting to be run per second
• Number of processes running per second
• Network sockets
•Number of open tcp sockets
•Number of open udp sockets
•Number of open raw sockets
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