You can certainly adjust the two values as needed for your particular environment. Also check in your universe_wsgi.ini for: set_metadata_externally = True Something else you might want to consider, and what we do to handle the load on the server at http://usegalaxy.org, is starting more instances to balance the load. For reference, our settings for pool_size and max_overflow are 10 and 20, respectively. See https://bitbucket.org/galaxy/galaxy-central/wiki/Config/ProductionServer for a good reference with more details on setting up a high performance galaxy server in a production environment suitable for multiple users. -Dannon On Apr 21, 2011, at 1:47 PM, Liisa Koski wrote:

Hi, We are running many NGS workflows at the same time on our local instance of Galaxy. They are crashing with the following error

Error - <class 'sqlalchemy.exc.TimeoutError'>: QueuePool limit of size 5 overflow 10 reached, connection timed out, timeout 30

In the universe_wsgi.ini we made the following adjustments:

# If the server logs errors about not having enough database pool connections, # you will want to increase these values, or consider running more Galaxy # processes. database_engine_option_pool_size = 50 # this used to be 5 database_engine_option_max_overflow = 100 # this used to be 100

Those numbers were pulled out of a hat so I wanted to make sure what we were doing was correct. Is there a limit on the values? It doesn't appear to be crashing anymore but I still want to make sure.

Thanks, Liisa___________________________________________________________ Please keep all replies on the list by using "reply all" in your mail client. To manage your subscriptions to this and other Galaxy lists, please use the interface at:

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