There is no need to start a second task to measure lag, it can in fact be measured with enough precision from the exisitng one.

Essentials/src/com/earth2me/essentials/Essentials.java

@@ -84,7 +84,7 @@ public class Essentials extends JavaPlugin implements IEssentials
 	private transient ExecuteTimer execTimer;
 	private transient I18n i18n;
 	private transient Metrics metrics;
-	private transient LagMeter lagMeter;
+	private transient EssentialsTimer timer;
 
 	@Override
 	public ISettings getSettings()
@@ -239,12 +239,9 @@ public class Essentials extends JavaPlugin implements IEssentials
 
 		pm.registerEvents(tntListener, this);
 
-		final EssentialsTimer timer = new EssentialsTimer(this);
+		timer = new EssentialsTimer(this);
 		getScheduler().scheduleSyncRepeatingTask(this, timer, 1, 100);
 
-		lagMeter = new LagMeter();
-		getScheduler().scheduleSyncRepeatingTask(this, lagMeter, 0, 40);
-
 		Economy.setEss(this);
 		execTimer.mark("RegListeners");
 
@@ -626,9 +623,10 @@ public class Essentials extends JavaPlugin implements IEssentials
 		return i18n;
 	}
 
-	public LagMeter getLagMeter()
+	@Override
+	public EssentialsTimer getTimer()
 	{
-		return lagMeter;
+		return timer;
 	}
 
 	private static class EssentialsWorldListener implements Listener, Runnable

Essentials/src/com/earth2me/essentials/EssentialsTimer.java

@@ -2,6 +2,7 @@ package com.earth2me.essentials;
 
 import java.util.HashSet;
 import java.util.Iterator;
+import java.util.LinkedList;
 import java.util.Set;
 import java.util.logging.Level;
 import org.bukkit.entity.Player;
@@ -11,6 +12,8 @@ public class EssentialsTimer implements Runnable
 {
 	private final transient IEssentials ess;
 	private final transient Set<User> onlineUsers = new HashSet<User>();
+	private transient long lastPoll = System.currentTimeMillis() - 3000;
+	private final transient LinkedList<Float> history = new LinkedList<Float>();
 
 	EssentialsTimer(final IEssentials ess)
 	{
@@ -21,6 +24,21 @@ public class EssentialsTimer implements Runnable
 	public void run()
 	{
 		final long currentTime = System.currentTimeMillis();
+		long timeSpent = (currentTime - lastPoll) / 1000;
+		if (timeSpent == 0)
+		{
+			timeSpent = 1;
+		}
+		if (history.size() > 10)
+		{
+			history.remove();
+		}
+		float tps = 100f / timeSpent;
+		if (tps <= 20)
+		{
+			history.add(tps);
+		}
+		lastPoll = currentTime;
 		for (Player player : ess.getServer().getOnlinePlayers())
 		{
 			try
@@ -51,4 +69,17 @@ public class EssentialsTimer implements Runnable
 			user.resetInvulnerabilityAfterTeleport();
 		}
 	}
+
+	public float getAverageTPS()
+	{
+		float avg = 0;
+		for (Float f : history)
+		{
+			if (f != null)
+			{
+				avg += f;
+			}
+		}
+		return avg / history.size();
+	}
 }

Essentials/src/com/earth2me/essentials/IEssentials.java

@@ -71,5 +71,5 @@ public interface IEssentials extends Plugin
 	
 	void setMetrics(Metrics metrics);
 	
-	LagMeter getLagMeter();
+	EssentialsTimer getTimer();
 }

Essentials/src/com/earth2me/essentials/LagMeter.java

@@ -1,44 +0,0 @@
-package com.earth2me.essentials;
-
-import java.util.LinkedList;
-
-
-public class LagMeter implements Runnable
-{
-	private transient long lastPoll = System.currentTimeMillis() - 3000;
-	private final transient LinkedList<Float> history = new LinkedList<Float>();
-
-	@Override
-	public void run()
-	{
-		long now = System.currentTimeMillis();
-		long timeSpent = (now - lastPoll) / 1000;
-		if (timeSpent == 0)
-		{
-			timeSpent = 1;
-		}
-		if (history.size() > 10)
-		{
-			history.remove();
-		}
-		float tps = 40f / timeSpent;
-		if (tps <= 20)
-		{
-			history.add(tps);
-		}
-		lastPoll = now;
-	}
-
-	public float getAverageTPS()
-	{
-		float avg = 0;
-		for (Float f : history)
-		{
-			if (f != null)
-			{
-				avg += f;
-			}
-		}
-		return avg / history.size();
-	}
-}

Essentials/src/com/earth2me/essentials/commands/Commandgc.java

@@ -17,7 +17,7 @@ public class Commandgc extends EssentialsCommand
 	@Override
 	protected void run(final Server server, final CommandSender sender, final String commandLabel, final String[] args) throws Exception
 	{
-		float tps = ess.getLagMeter().getAverageTPS();
+		float tps = ess.getTimer().getAverageTPS();
 		ChatColor color;
 		if (tps >= 18)
 		{