How to monitor connection pooling for .NET MySQL Data Connector in IIS

Question

I have googled a fair bit on this, but not been able to find an exact answer. We are seeing the following errors in our logs:

Timeout expired. The ti

Answer 1

I have done two things to help with this problem.

• Upgraded the MySQL drivers.
• Used code from How to query the current size of the MySQL's .Net connector's connection pool? to create a web page to monitor the state of the connection pool on my server.

The full code I use is:

string path = u.MapPath("~/bin/MySql.Data.dll");
Assembly ms = Assembly.LoadFrom(path);
Type type = ms.GetType("MySql.Data.MySqlClient.MySqlPoolManager");
MethodInfo mi = type.GetMethod("GetPool", BindingFlags.Static | BindingFlags.Public);

var pool = mi.Invoke(null, new object[] { new MySqlConnectionStringBuilder(ConnectionString) });
Type mip = ms.GetType("MySql.Data.MySqlClient.MySqlPool");
MemberInfo[] mei1 = mip.GetMember("inUsePool", BindingFlags.NonPublic);
totalAvailable = (int)pool.GetType().InvokeMember("available", BindingFlags.GetField | System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance, null, pool, new object[] { });
var o = pool.GetType().InvokeMember("inUsePool", BindingFlags.GetField | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance, null, pool, new object[] { });
var o1 = pool.GetType().InvokeMember("idlePool", BindingFlags.GetField | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance, null, pool, new object[] { });
inUseCount = (int)o.GetType().InvokeMember("Count", BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.Public, null, o, null);
idleCount = (int)o1.GetType().InvokeMember("Count", BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.Public, null, o1, null);