### Understand the alert

The vcsa_swap_health alert presents the swap health status of the VMware vCenter virtual machine. It is an indicator of the overall health of memory swapping on the vCenter virtual machine.

### Troubleshoot the alert

1. First, identify the health status of the alert by checking the color and its corresponding description in the table above.

2. Log in to the VMware vSphere Web Client:
   - Navigate to `https://<vCenter-IP-address-or-domain-name>:<port>/vsphere-client`, where `<vCenter-IP-address-or-domain-name>` is your vCenter Server system IP or domain name, and `<port>` is the port number over which to access the vSphere Web Client.
   - Enter the username and password, and click Login.

3. Navigate to the vCenter virtual machine, and select the Monitor tab.

4. Verify the swap file size by selecting the `Performance` tab, and choosing `Advanced` view.

5. Monitor the swap usage on the virtual machine:
   - On the `Performance` tab, look for high swap usage (`200 MB` or above). If necessary, consider increasing the swap file size.
   - On the `Summary` tab, check for any warning or error messages related to the swap file or its usage.

6. Check if there are any leading processes consuming an unreasonable amount of memory:
   - If running a Linux-based virtual machine, use command-line utilities like `free`, `top`, `vmstat`, or `htop`. Look out for processes with high `%MEM` or `RES` values.
   - If running a Windows-based virtual machine, use Task Manager or Performance Monitor to check for memory usage.

7. Optimize the virtual machine memory settings:
   - Verify if the virtual machine has sufficient memory allocation.
   - Check the virtual machine's memory reservation and limit settings.
   - Consider enabling memory ballooning for a better utilization of available memory.

8. If the swap health status does not improve or you are unsure how to proceed, consult VMware documentation or contact VMware support for further assistance.

### Useful resources

1. [Configuring VMware vCenter 7.0](https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vcenter.configuration.doc/GUID-ACEC0944-EFA7-482B-84DF-6A084C0868B3.html)
2. [Virtual Machine Memory Management Concepts](https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/techpaper/perf-vsphere-memory_management.pdf)
