update processes are alwyas be hanging

Dears,

1. In T-code SM12 that I checked the Maximum number of Lock Entries is 18218 and Maximum Fill level is also 18218, the parameter "enque/table_size" is defualt value 32768, I think it's too small and it maybe cause the update processes are all hanging,
I want to adjust it more bigger, could you please give me a suggesting value ?

2. We increased two Dialog Instance on July and the issue(update work processes are always be hanging) happened from Augest 1st, I checked the DB parameter 'sessions' value is 2000 and 'processes' value is 1000, do we need to increase the value ?

Thanks,
Michael