Make Workers open and close a database connection

[adnseek]

Hi Gammazero,

i'm using your great workerpool, and i have a problem. I use the submit() function to add jobs that are processed by the workers. But these workers need to perform database tasks. When i submit my worker function and put the db.Open and db.Close inside, i have too many connections.

My Question is now : is it possible to let the workers themselves open and close the connections, so that i always have the limited number of connections open. That would be awesome

Thanks in advance Adrian

[adnseek]

i changed my code now from .Submit() top .WaitSubmit(). Thats slower, but it somehow works.

Maybe you have an idea about my upper question nevertheless.

Adrian

[hut8]

Are you using the standard library's database/sql package? If so, you can just create one sql.DB and share it. It has its own pool of connections. The limit is set by https://pkg.go.dev/database/sql#DB.SetMaxOpenConns , which by default is unlimited. If it tries to make that many connections, something else is wrong. Posting your code would help.

See: https://go.dev/doc/database/manage-connections

[adnseek]

hi @hut8 the solution was to put the sql.Open and Close to the start and the end of the job's function.