This article provides an explanation of the changes made to the way in which files are cached as Sophos Anti-Virus scans them.
Applies to the following Sophos product(s) and version(s) Sophos Anti-Virus for Windows 2000+ 10.2.2 VDL4.84G
Since the release of Sophos Anti-Virus 10.2 an updated file caching system has been implemented. Sophos Anti-Virus now regularly queries the system USN journal to check for file changes.
This means that under certain conditions, if a file has not changed since the last time it was scanned then it need not be scanned again. This can lead to performance increases as files are not needlessly re-scanned.
The journal will be ignored under the following circumstances:
The cache can be cleared manually if required to ensure that all files are scanned once again.
The on-access cache can be cleared as follows:
Clear the on-access and on-demand scan cache:
Both the on-access scanner cache and on-demand scanner can be cleared as follows (NOTE: The on-demand scanner cache cannot be cleared manually without clearing the on-access cache):
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