If you have arrived here, then you have identified a low available RAM condition on your Windows computer. If this is not correct, then return to the Start of the Performance Guide.
When the counter “\Memory\Available MBytes" has a value less than 64, then the computer is low on available RAM. This is certainly a relative threshold because years ago when computers had only 100MBs of RAM, 64MBs of available RAM would have been a good thing. In this case, we assume at least 1GB of RAM is installed on the computer, therefore 64MBs would be considered too low.
The Available MBytes counter is the sum of all free, zero (a page of memory with all zeroes written to it), and standby pages of memory. All of this memory is page of RAM that can be reused for processes. Generally, about 10% of your RAM being available is considered good because that allows up to 10% of it to be used for disk cache – meaning if a file is being read from the disk, but it already has it in disk cache, then it reads it from RAM versus going to the disk. Disks are dramatically slower than RAM, so having a lot of RAM being used for disk cache is a good this. This is why it is a good thing to have more RAM.
If the “\Memory\Free & Zero Page List Bytes” counter constantly has over 100MBs or more of memory, then this means that you likely have too much RAM which isn’t a bad thing unless you are concerned about the electricity drain from the RAM modules.
If Available MBytes is less than 10% of RAM or less than 100 [MBs], then it is important to determine which processes are consuming the most RAM, the processes on an increasing trend or RAM usage, the System Cache memory usage, and if the system is reaching its commit limit.
If all of the above troubleshooting steps have been exhausted, then the symptoms of low available RAM can be treated with one or more of the following:
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