What does standby mean for RAM in Server 2008 R2?

Question

RAM

There is a server, Server 2008 R2 with 32GB of RAM on board. Worth MSSQL, programs that work with this database have recently begun to slow down. They began to look at what was happening with the resources and saw this picture:
What does the standby mode mean? Is it some kind of "reserve" for the system or something that is already "reserved" by something in the system? I correctly understand that even if almost 6 GB hangs in "waiting" and zero is free, then the server does not have enough memory?

Answer 1

RAMMap will show what files are there.

Answer 2

Perhaps MS SQL has been allocated more memory than is available in the OS and it is waiting for what was promised to it to be freed.
https://habr.com/en/post/448044/