This identifier indicates whether ISAPI extensions are cached in memory after use. If the value of this identifier is TRUE, the .DLL file will remain in the cache until the sever is stopped. If the value is FALSE, extensions are unloaded from memory upon completing the task for which they were loaded.
| Data type | DWORD |
| Default inheritance | Inheritable |
| User type | IIS_MD_UT_FILE |
This identifier is available at the following metabase keys:
| Metabase Path | Key Type |
| /LM/W3SVC/n | IIsWebServer |
ISAPI extensions are cached or not cached based on the value of this identifier at the time they were loaded into memory for use. Thus, if this identifier is changed after an extension has been loaded and cached, the change will have no effect on that extension.