How many number of days a message will be left unconsumed in Solace queue ?
unlimited... unless you configure a TTL (Time-to-live) on the queue.
With that, a message is e.g. deleted from a queue after 10 minutes.
Hi @Kinjal Shah,
As @uherbst mentions this is configurable. The docs are a good starting point as the TTL can be set on a message by message basis. Setting this differs per API but here is a tutorial with JCSMP.
Also in the PS+ Manager if you look at a queue endpoint you'll see these options which allow you to configure how you'd like this handled.