BlobCache for SharePoint Site not working

Hi,

I have configured blobcahe for sharepoint site for better performance. But I have noticed that it is not working and grown only 45 KB in size during the last 2 months. Also upon looking in blob cache folder I have noticed that only some of the extensions (jpg, css, gif) are cached in BLOB folder. FYI I have included included following extensions in web.config file

<BlobCache location="C:\blobCache" path="\.(gif|jpg|png|jpeg|jpe|jfif|bmp|dib|tif|tiff|ico|png|wdp|hdp|css|js|asf|css|js)$" maxSize="10" enabled="true" />

FYI: I have alloted 10 GB space for BlobCache folder which is enough for my environment.

Is there are any further setting which needs to be configured ? Any help and support in this regard will be greatly appreciated.

Thanks