電話SetSystemFileCacheSize未能在C++

Question

下面調用SetSystemFileCacheSize（）失敗，但它傳遞如果與0

取代「FILE_CACHE_MIN_HARD_ENABLE」我在做什麼錯？

SIZE_T dwMinimumFileCacheSize = 1048576; // Exact number reported by SetSystemFileCacheSize. 
SIZE_T dwMaximumFileCacheSize = 1099511627776; // Exact number reported by SetSystemFileCacheSize. 

int result = SetSystemFileCacheSize(
    dwMinimumFileCacheSize, // dwMinimumWorkingSetSize 
    dwMaximumFileCacheSize, // dwMaximumWorkingSetSize, 
    FILE_CACHE_MIN_HARD_ENABLE // Works if this flag is set to 0. 
); 
if (result == 0) 
{ 
    // Error is "5" if it fails. 
    wprintf(L" Error E2469: Could not set size of system cache, error %u.\n", GetLastError()); 
} 
else 
{ 
    wprintf(L" Pass.\n"); 
} 

Answer 1

事實證明，dwMinimumFileCacheSize必須比dwMaximumFileCacheSize少64KB，如果啓用FILE_CACHE_MIN_HARD_ENABLE。

這裏是修復：

int result = SetSystemFileCacheSize(
    dwMinimumFileCacheSize - 64 * 1024, // dwMinimumWorkingSetSize 
    dwMaximumFileCacheSize, // dwMaximumWorkingSetSize, 
    FILE_CACHE_MIN_HARD_ENABLE // Works if this flag is set to 0. 
);