System.outofmemory exception when running Powershell script - visual-studio-2010

Question

I've written VC++ code to run Powershell scripts on a remote server. I create a PSSession to a server first and then I run around 30000 commandlets. While performing this operation, I receive System.outofmemory exception. I've also tried to increase 'MaxMemoryPerShellMB' to 2048, but that doesn't solve the problem. Kindly advise. This is my code:
runSpace = RunspaceFactory::CreateRunspace();
runSpace->Open();
ps = PowerShell::Create();
ps->Runspace = runSpace;
PSCommand^ rmcommand = gcnew PSCommand();
Uri^ uri = gcnew Uri("http://"+ serverName +"/powershell?serializationLevel=Full");
rmcommand->AddCommand("New-PSSession");
rmcommand->AddParameter("ConfigurationName", "Microsoft.Exchange");
rmcommand->AddParameter("ConnectionUri", uri);
rmcommand->AddParameter("Authentication", "kerberos");
rmcommand->AddParameter("Name", "pssession");
PSSessionOption^ sessionOption = gcnew PSSessionOption();
sessionOption->SkipCACheck = true;
sessionOption->SkipCNCheck = true;
sessionOption->SkipRevocationCheck = true;
rmcommand->AddParameter("SessionOption", sessionOption);
ps->Commands = rmcommand;
Collection<PSObject^>^ result = ps->Invoke();
rmcommand = gcnew PSCommand();
rmcommand->AddScript("Set-ExecutionPolicy -ExecutionPolicy RemoteSigned");
ps->Commands = rmcommand;
ps->Invoke();
rmcommand = gcnew PSCommand();
rmcommand->AddScript("Import-PSSession -Session $session -CommandName 'Get-MailboxStatistics'");
ps->Commands = rmcommand;
ps->Invoke();
PSCommand^ command = gcnew PSCommand();
for(size i = 0; i < 30000; i++)
{
mbxidentity=mailbox[i];
command = gcnew PSCommand();
command->AddScript("Get-MailboxStatistics -Identity \'" + mbxidentity + "\' | select LegacyDN");
ps->Commands = command;
Collection<PSObject^>^ result = ps->Invoke();
//Do something with result
}
Here 'mailbox' is an array containing list of mailbox identities. Also, I get Outofmemory at different places. Sometimes I get it when running New-PSSession itself. Sometimes, around 1000 commandlets run successfully and then I get the exception. What might be the problem? I have checked the memory of the remote serve and it is fine.

Answer 1

I'm not very experienced with running powershell code with c++/c#. My comments were getting big, so I'll use an answer to ask questions etc.
Have you restarted the winrm-service on the server(s) after raising
the MaxMemoryPerShellMB?
Why are you running Get-Mailbox? I can't see that you're storing the output anywhere, and this would probably create a lot of objects = memory-usage