[SalesForce] Time Based Workflow – Records not getting added to the queue? or Queue limit exceeded

1. The pending actions in the queue will not be affected. In fact, the pending actions int eh queue that don't match the new criteria will remain in the queue. The criteria is only checked upon entry to the queue. changing the entry criteria doesn't effect those actions that already made it into the queue. I have been burned on this before.

2. IMO, technically, it really doesn't matter. Change sets would be faster

3. See my answer to 1. This is definitely a caveat. Changing the criteria only effects newly evaluated records. The actions already in the queue stay int eh queue even if they don't match the newly updated criteria. As I said this has tripped me up in the past

Hope that Helps

I dont think there is any such limit, nothing that I came across. Lets consider I created 10 Million accounts using dataloader and have a workflow rule with time trigger like 10 days after created date, the queue may show 10 million pending actions if I search by this workflow name. The only thing you need to take care is the hourly limit of execution.

Salesforce limits the number of time triggers an organization can execute per hour. If an organization exceeds the limits for its Edition, Salesforce defers the execution of the additional time triggers to the next hour. For example, if an Unlimited Edition organization has 1,200 time triggers scheduled to execute between 4:00 PM and 5:00 PM, Salesforce processes 1,000 time triggers between 4:00 PM and 5:00 PM and the remaining 200 time triggers between 5:00 PM and 6:00 PM.