Solaris is a Unix-based operating system developed by Oracle Corporation. It is designed to be scalable, secure, and reliable, and is used in a variety of enterprise applications. One of the key tasks that system administrators must perform is to monitor memory usage to ensure that the system has enough memory to run all of the applications and services that are required.
There are a number of different ways to check memory usage in Solaris. One common method is to use the `vmstat` command. The `vmstat` command provides a real-time display of memory usage, as well as other system statistics. To use the `vmstat` command, simply type `vmstat` at the command prompt. The output of the `vmstat` command will look something like this: