Will too many instances created problem in production?

Hi,
  I have a approval workflow for customer creation. It is transported to production. Now a 500 customers are created at a stretch in production. will this affect the performance of the workflow?
How do we check the performance of the workflow ? what are the ways that we can follow for effective performance of workflow?
Thanks,
Sivagami.R

Hi,
In production, the workflow was working fine. Suddenly the dialog workitem text is not getting replaced with variable values. it is shown as Customer &customer.number& instead of the values.
At a small span of time nearly 1000 customers have been created and this workflow has been triggered for all instances. Can this be a reason for the probelm.
Thanks,
Sivagami

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