When net change is enabled for an export, Kourier tracks these changes by creating an RDBMS index named KCL_INDEX and by creating a subfile under the KT_CHGLOG file. The name of this subfile, in most cases, is the name of the file referenced in the Export Data File field. The modulo of the subfile created is determined by using then original modulo of the Export Data File multipled by 5% with a minimum modulo of 7. If the Export Data File referenced is a dynamic file, the module of the subfile is set to 1009. The creation of the KCL_INDEX and the subfile only occur on the first reference to the Export Data File across any number of exports (applications).
Do NOT resize the KT_CHGLOG file and its associated subfiles using the standard RDBMS or third party resizing tools. Instead, use the KCL.RESIZELOG command. The KCL.RESIZELOG command should be run periodically as part of you normal file maintenance activities.
Kourier Integrator Setup and Administration Guide