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FloatSamCache: dont use slideexpire on current libovm expirecache. Change example settings to use memory cache with short expire time. ( 20% to 40% mem cache hit rates observed

melanie
UbitUmarov 2016-12-25 05:46:16 +00:00
parent 8d0b592e5d
commit 293b65ac82
2 changed files with 58 additions and 30 deletions
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69
OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs
View File

@ -62,7 +62,8 @@ namespace OpenSim.Region.CoreModules.Asset
MethodBase.GetCurrentMethod().DeclaringType);
private bool m_Enabled;
private bool m_Running;
private bool m_timerRunning;
private bool m_cleanupRunning;
private const string m_ModuleName = "FlotsamAssetCache";
private const string m_DefaultCacheDirectory = "./assetcache";
@ -91,9 +92,8 @@ namespace OpenSim.Region.CoreModules.Asset
private bool m_MemoryCacheEnabled = false;
// Expiration is expressed in hours.
private const double m_DefaultMemoryExpiration = 2;
private double m_MemoryExpiration = 0.001;
private const double m_DefaultFileExpiration = 48;
private TimeSpan m_MemoryExpiration = TimeSpan.FromHours(m_DefaultMemoryExpiration);
private TimeSpan m_FileExpiration = TimeSpan.FromHours(m_DefaultFileExpiration);
private TimeSpan m_FileExpirationCleanupTimer = TimeSpan.FromHours(1.0);
@ -150,7 +150,8 @@ namespace OpenSim.Region.CoreModules.Asset
m_CacheDirectory = assetConfig.GetString("CacheDirectory", m_DefaultCacheDirectory);
m_MemoryCacheEnabled = assetConfig.GetBoolean("MemoryCacheEnabled", m_MemoryCacheEnabled);
m_MemoryExpiration = TimeSpan.FromHours(assetConfig.GetDouble("MemoryCacheTimeout", m_DefaultMemoryExpiration));
m_MemoryExpiration = assetConfig.GetDouble("MemoryCacheTimeout", m_MemoryExpiration);
m_MemoryExpiration *= 3600.0; // config in hours to seconds
#if WAIT_ON_INPROGRESS_REQUESTS
m_WaitOnInprogressTimeout = assetConfig.GetInt("WaitOnInprogressTimeout", 3000);
@ -224,9 +225,9 @@ namespace OpenSim.Region.CoreModules.Asset
m_Scenes.Remove(scene);
lock(timerLock)
{
if(m_Running && m_Scenes.Count <= 0)
if(m_timerRunning && m_Scenes.Count <= 0)
{
m_Running = false;
m_timerRunning = false;
m_CacheCleanTimer.Stop();
m_CacheCleanTimer.Close();
}
@ -242,7 +243,7 @@ namespace OpenSim.Region.CoreModules.Asset
m_AssetService = scene.RequestModuleInterface<IAssetService>();
lock(timerLock)
{
if(!m_Running)
if(!m_timerRunning)
{
if (m_FileCacheEnabled && (m_FileExpiration > TimeSpan.Zero) && (m_FileExpirationCleanupTimer > TimeSpan.Zero))
{
@ -250,7 +251,7 @@ namespace OpenSim.Region.CoreModules.Asset
m_CacheCleanTimer.AutoReset = false;
m_CacheCleanTimer.Elapsed += CleanupExpiredFiles;
m_CacheCleanTimer.Start();
m_Running = true;
m_timerRunning = true;
}
}
}
@ -263,6 +264,7 @@ namespace OpenSim.Region.CoreModules.Asset
private void UpdateMemoryCache(string key, AssetBase asset)
{
// NOTE DO NOT USE SLIDEEXPIRE option on current libomv
m_MemoryCache.AddOrUpdate(key, asset, m_MemoryExpiration);
}
@ -480,12 +482,10 @@ namespace OpenSim.Region.CoreModules.Asset
asset = GetFromMemoryCache(id);
if (asset == null && m_FileCacheEnabled)
{
asset = GetFromFileCache(id);
if (m_MemoryCacheEnabled && asset != null)
UpdateMemoryCache(id, asset);
}
if (((m_LogLevel >= 1)) && (m_HitRateDisplay != 0) && (m_Requests % m_HitRateDisplay == 0))
{
@ -561,8 +561,12 @@ namespace OpenSim.Region.CoreModules.Asset
if (m_LogLevel >= 2)
m_log.DebugFormat("[FLOTSAM ASSET CACHE]: Checking for expired files older then {0}.", m_FileExpiration);
if(!m_Running)
lock(timerLock)
{
if(!m_timerRunning || m_cleanupRunning)
return;
m_cleanupRunning = true;
}
// Purge all files last accessed prior to this point
DateTime purgeLine = DateTime.Now - m_FileExpiration;
@ -578,8 +582,9 @@ namespace OpenSim.Region.CoreModules.Asset
lock(timerLock)
{
if(m_Running)
if(m_timerRunning)
m_CacheCleanTimer.Start();
m_cleanupRunning = false;
}
}
@ -816,13 +821,13 @@ namespace OpenSim.Region.CoreModules.Asset
s.ForEachSOG(delegate(SceneObjectGroup e)
{
if(!m_Running && !storeUncached)
if(!m_timerRunning && !storeUncached)
return;
gatherer.AddForInspection(e);
gatherer.GatherAll();
if(!m_Running && !storeUncached)
if(!m_timerRunning && !storeUncached)
return;
foreach (UUID assetID in gatherer.GatheredUuids.Keys)
@ -854,13 +859,13 @@ namespace OpenSim.Region.CoreModules.Asset
}
gatherer.GatheredUuids.Clear();
if(!m_Running && !storeUncached)
if(!m_timerRunning && !storeUncached)
return;
if(!storeUncached)
Thread.Sleep(50);
});
if(!m_Running && !storeUncached)
if(!m_timerRunning && !storeUncached)
break;
}
@ -905,16 +910,23 @@ namespace OpenSim.Region.CoreModules.Asset
{
List<string> outputLines = new List<string>();
double fileHitRate = (double)m_DiskHits / m_Requests * 100.0;
double invReq = 100.0 / m_Requests;
double fileHitRate = m_DiskHits * invReq;
outputLines.Add(
string.Format("File Hit Rate: {0}% for {1} requests", fileHitRate.ToString("0.00"), m_Requests));
if (m_MemoryCacheEnabled)
{
double memHitRate = (double)m_MemoryHits / m_Requests * 100.0;
double HitRate = m_MemoryHits * invReq;
outputLines.Add(
string.Format("Memory Hit Rate: {0}% for {1} requests", memHitRate.ToString("0.00"), m_Requests));
string.Format("Memory Hit Rate: {0}% for {1} requests", HitRate.ToString("0.00"), m_Requests));
HitRate += fileHitRate;
outputLines.Add(
string.Format("Total Hit Rate: {0}% for {1} requests", HitRate.ToString("0.00"), m_Requests));
}
outputLines.Add(
@ -1019,17 +1031,27 @@ namespace OpenSim.Region.CoreModules.Asset
break;
case "assets":
con.Output("Ensuring assets are cached for all scenes.");
lock(timerLock)
{
if(m_cleanupRunning)
{
con.OutputFormat("FloatSam assets check already running");
return;
}
m_cleanupRunning = true;
}
con.Output("FloatSam Ensuring assets are cached for all scenes.");
WorkManager.RunInThread(delegate
{
bool wasRunning= false;
lock(timerLock)
{
if(m_Running)
if(m_timerRunning)
{
m_CacheCleanTimer.Stop();
m_Running = false;
m_timerRunning = false;
wasRunning = true;
Thread.Sleep(100);
}
@ -1041,8 +1063,9 @@ namespace OpenSim.Region.CoreModules.Asset
if(wasRunning)
{
m_CacheCleanTimer.Start();
m_Running = true;
m_timerRunning = true;
}
m_cleanupRunning = false;
}
con.OutputFormat("Completed check with {0} assets.", assetReferenceTotal);
}, null, "TouchAllSceneAssets");

13
bin/config-include/FlotsamCache.ini.example
View File

@ -20,15 +20,20 @@
HitRateDisplay = 100
; Set to false for no memory cache
MemoryCacheEnabled = false
; assets can be requested several times in short periods
; so even a small memory cache is usefull
MemoryCacheEnabled = true
; Set to false for no file cache
FileCacheEnabled = true
; How long {in hours} to keep assets cached in memory, .5 == 30 minutes
; Optimization: for VPS or limited memory system installs set Timeout to .016 (1 minute)
; increases performance without large memory impact
MemoryCacheTimeout = 2
; even a few minutes may mean many assets loaded to memory, if not all.
; this is good if memory is not a problem.
; if memory is a problem then a few seconds may actually save same.
; reducing duplications.
; see hit rates with console comand: fcache status
MemoryCacheTimeout = .001 // 3.6s ie around 4s (1s resolution)
; How long {in hours} to keep assets cached on disk, .5 == 30 minutes
; Specify 0 if you do not want your disk cache to expire