Extensive lag time when trying to do any check-out/in

For the past two days, any time I try to run the check-out/in with a class, there is a long delay with each item. It takes a long time for the book barcode to register and a long time to find the patron and a long time to save so I can move on to the next patron. The entire process is running into minutes which is really frustrating for a class of 30 trying to get out the door. I am also experiencing and "ERROR 500" fairly regularly. Is this because of the system error of that last month or something else particular to my account? Thanks for any insight and help you can give.

Same problem here

This may be related to the issue discussed here. Slow reaction times when updating records is exactly the kind of things that overworked servers can suffer from.

(more information in post 29 of that thread, and post 32)

Same problem here since Sunday. The library opening hour on Sunday morning is extremely important for us especially we are planning to promote the library online catalog to our church members.