Platform Deployment Guide › Known Issues (Deployment) › IM Import › Increase Size of .CNV Cache to Improve Import Performance

Increase Size of .CNV Cache to Improve Import Performance

For IM certain dump files, IMFrontEnd.exe performance can be significantly improved by increasing the size of the .CNV file cache. To do this, you need to raise the value of the MaxFiles parameter.

As IMFrontEnd.exe processes a dump file, it needs to continually open and write to the relevant .CNV file. But for certain dump file formats, the internal structure of the dump file requires that individual .CNV files need to be continually reopened and updated, rather than being generated and closed in a single operation.

For these dump file formats, the comments that collectively make up an individual IM conversation, and which must be written to a single .CNV file, are not aggregated but occur throughout the dump file. This means that as IMFrontEnd.exe sequentially processes the dump file, it needs to continually open and close the relevant .CNV files. These file operations account for a high proportion of the total dump file processing time, so increasing the number of cached .CNV files can substantially reduce the processing overhead.