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Evaluating Available Memory
When running several applications in a Linux environment, constant tracking of system health is crucial for smooth operations. Evaluating available memory as part of a server review is a common practice for system administrators. This involves using various command-line tools provided by Linux, such as free, vmstat, and top. These can assist in monitoring memory usage and performance metrics, ensuring systems are not overloaded, and adequate resources are available for important applications.
The free command, for instance, gives a summary of the overall memory usage including total used and free memory, swap memory and buffer/cache memory. Here’s an example:
$ free -h
total used free shared buff/cache available
Mem: 15Gi 10Gi 256Mi 690Mi 5.3Gi 4.2Gi
Swap: 8.0Gi 1.3Gi 6.7Gi
In this output, the -h option is used to present the results in a human-readable format. Understanding the state of memory usage in your Linux server can help maintain optimal server performance and troubleshoot any potential issues.