Buffer size for FileSystemPageManager

Buffer size for FileSystemPageManager is one page by default

Author: victor.scherbakov

DataTanker/Core/PageManagement/FileSystemPageManager.cs

@@ -725,7 +725,7 @@ private void Dispose(bool disposing)
         /// </summary>
         /// <param name="pageSize"></param>
         internal FileSystemPageManager(int pageSize) 
-            : this (pageSize, false, 100)
+            : this (pageSize, false, 1)
         {
         }
 

DataTanker/Core/StorageFactory.cs

@@ -334,9 +334,7 @@ public IBPlusTreeKeyValueStorage<ComparableKeyOf<TKey>, ValueOf<TValue>> CreateB
             IPageManager fsPageManager = null;
             try
             {
-                var asyncWriteBuffer = usePageCache ? Math.Min(settings.CacheSettings.MaxDirtyPages, 1000) : 100;
-
-                fsPageManager = new FileSystemPageManager((int)settings.PageSize, settings.ForcedWrites, asyncWriteBuffer, true) { MaxEmptyPages = settings.MaxEmptyPages };
+                fsPageManager = new FileSystemPageManager((int)settings.PageSize, settings.ForcedWrites, 1, true) { MaxEmptyPages = settings.MaxEmptyPages };
 
                 pageManager = usePageCache ?
                                 new CachingPageManager(fsPageManager, settings.CacheSettings.MaxCachedPages, settings.CacheSettings.MaxDirtyPages)
@@ -399,9 +397,7 @@ public IKeyValueStorage<KeyOf<TKey>, ValueOf<TValue>> CreateRadixTreeStorage<TKe
             IPageManager fsPageManager = null;
             try
             {
-                var asyncWriteBuffer = usePageCache ? Math.Min(settings.CacheSettings.MaxDirtyPages, 1000) : 100;
-
-                fsPageManager = new FileSystemPageManager((int)settings.PageSize, settings.ForcedWrites, asyncWriteBuffer, true) { MaxEmptyPages = settings.MaxEmptyPages };
+                fsPageManager = new FileSystemPageManager((int)settings.PageSize, settings.ForcedWrites, 1, true) { MaxEmptyPages = settings.MaxEmptyPages };
 
                 pageManager = usePageCache ?
                                 new CachingPageManager(fsPageManager, settings.CacheSettings.MaxCachedPages, settings.CacheSettings.MaxDirtyPages)