public HttpResponseMessage LowMemoryNotification()
{
if (EnsureSystemDatabase() == false)
{
return(GetMessageWithString("Low memory simulation is only possible from the system database", HttpStatusCode.BadRequest));
}
MemoryStatistics.SimulateLowMemoryNotification();
return(GetEmptyMessage());
}
public void get_debug_info_ForSpecifiedDatabaseReducedBatchSizeAutoTuner()
{
using (var documentStore = NewDocumentStore())
{
documentStore.DatabaseCommands.GlobalAdmin.CreateDatabase(new DatabaseDocument
{
Id = "Dba1",
Settings =
{
{ "Raven/DataDir", "Dba1" }
}
});
var dbWorkContext = documentStore.ServerIfEmbedded.Options.DatabaseLandlord.GetResourceInternal("Dba1").Result.WorkContext;
var dbName = dbWorkContext.DatabaseName;
var reduceBatchSizeAutoTuner = new ReduceBatchSizeAutoTuner(dbWorkContext);
var prefetchingBehavior = new PrefetchingBehavior(PrefetchingUser.Indexer, dbWorkContext, reduceBatchSizeAutoTuner, string.Empty);
MemoryStatistics.SimulateLowMemoryNotification();
reduceBatchSizeAutoTuner.AutoThrottleBatchSize(100, 1024, TimeSpan.MinValue);
reduceBatchSizeAutoTuner.HandleLowMemory();
prefetchingBehavior.HandleLowMemory();
MemoryStatistics.RunLowMemoryHandlers("System detected low memory");
prefetchingBehavior.OutOfMemoryExceptionHappened();
prefetchingBehavior.HandleLowMemory();
var url = $"http://localhost:8079/databases/{dbName}/debug/auto-tuning-info";
var requestWithDbName = documentStore.JsonRequestFactory.CreateHttpJsonRequest(new CreateHttpJsonRequestParams(null, url, HttpMethods.Get,
documentStore.DatabaseCommands.PrimaryCredentials, documentStore.Conventions));
var results = requestWithDbName.ReadResponseJson().JsonDeserialization <AutoTunerInfo>();
var reason = results.Reason;
var reasonForLowMemoryCall = results.LowMemoryCallsRecords.First().Reason;
var lowMemoryRecords = results.LowMemoryCallsRecords.First().Operations;
Assert.Equal("System detected low memory", reasonForLowMemoryCall);
var urlAdmin = $"http://localhost:8079/databases/{dbName}/admin/debug/auto-tuning-info";
var requestWithDbNameAdmin = documentStore.JsonRequestFactory.CreateHttpJsonRequest(new CreateHttpJsonRequestParams(null, urlAdmin, HttpMethods.Get,
documentStore.DatabaseCommands.PrimaryCredentials, documentStore.Conventions));
var resultsAdmin = requestWithDbNameAdmin.ReadResponseJson().JsonDeserialization <AutoTunerInfo>();
var reasonAdmin = results.Reason;
var reasonForLowMemoryCallAdmin = resultsAdmin.LowMemoryCallsRecords.First().Reason;
var lowMemoryRecordsAdmin = resultsAdmin.LowMemoryCallsRecords.First().Operations;
var cpuUsageRecordsAdmin = resultsAdmin.CpuUsageCallsRecords;
Assert.Equal("System detected low memory", reasonForLowMemoryCallAdmin);
}
}
private static void ReleaseMemoryBeforeGC()
{
if (MemoryStatistics.AvailableMemory < (MemoryStatistics.TotalPhysicalMemory - MemoryStatistics.AvailableMemory) / 10)
{
if (Environment.TickCount - lastTimeMemoryReleasedBeforeGC < fiveSecondsInTicks)
{
return;
}
lastTimeMemoryReleasedBeforeGC = Environment.TickCount;
MemoryStatistics.SimulateLowMemoryNotification();
}
else
{
MemoryStatistics.InitiateSoftMemoryRelease();
}
}
