| CPU Monitoring |
CPU utilization per processor of a server |
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Know if a server is sized correctly in terms of processing power; |
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Determine times of day when CPU usage level is high; |
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Run queue length of a server |
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Determine how many processes are contending for CPU resources simultaneously; |
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Top 10 CPU consuming processes on a server |
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Know which processes are causing a CPU spike on the server; |
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Top 10 servers by CPU utilization |
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Know which servers have high CPU utilization, and which ones are under-utilized; |
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| Memory Monitoring |
Free memory availability |
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Track free memory availability on your servers; |
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Determine if your servers are adequately sized in terms of memory availability; |
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Swap memory usage |
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Determine servers with high swap usage; |
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Top 10 processes consuming memory on the server |
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Know which processes are taking up memory on a server; |
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Top 10 servers by memory usage |
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Know which servers have the lowest free memory available and hence, may be candidates for memory upgrades; |
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| I/O Monitoring |
Blocked processes |
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Track the number of processes blocked on I/O; |
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Indicates if there is an I/O bottleneck on the server; |
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Disk activity |
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Track the percentage of time that the disks on a server are heavily used; |
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Compare the relative busy times of the disks on a server to determine if you can better balance the load across the disks of a server; |
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Top 10 processes by disk activity |
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Determine which processes are causing disk reads/writes; |
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| Uptime Monitoring |
Current uptime |
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Determine how long a server has been up; |
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Track times when a server was rebooted; |
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Determine times when unplanned reboots happened; |
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Top 10 servers by uptime |
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Know which servers have not been rebooted for a long time; |
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| Disk Space Monitoring |
Total capacity |
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Know the total capacity of each of the disk partitions of a server; |
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Free space |
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Track the free space on each of the disk partitions of a server; |
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Proactively be alerted of high disk space levels on a server; |
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| Network Traffic Monitoring |
Incoming and outgoing traffic |
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Track the traffic into and out of a server through each interface; |
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Identify servers and network interfaces with maximum traffic; |
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| Linux Network Monitoring |
Packet loss |
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Track the quality of a network connection to a server; |
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Identify times when excessive packet loss happens; |
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Average delay |
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Determine the average delay of packets to a server; |
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Availability |
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Determine times when a server is not reachable over the network; |
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| TCP Monitoring |
Current connections |
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Track currently established TCP connections to a server; |
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Incoming/outgoing TCP connection rate |
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Monitor the server workload by tracking the rate of TCP connections to and from a server; |
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TCP retransmissions |
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Track the percentage of TCP segments retransmitted from the server to clients; |
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Be alerted when TCP retransmits are high and therefore, are likely to cause significant slowdowns in application performance; |
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| Process Monitoring |
Processes running |
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Track the number of processes of a specific application that are running simultaneously; |
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Identify times when a specific application process is not running; |
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CPU usage |
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Monitor the CPU usage of an application over time; |
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Determine times when an application is taking excessive CPU resources; |
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Memory usage |
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Track the memory usage of an application over time; |
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Identify if an application has a memory leak or not; |
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Server Log
Monitoring |
New events |
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Obtain details of the events in the system logs files (/var/adm/messages, sulog, syslog, etc.); |
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