The print spooler manages queued print work so applications do not have to remain directly connected to a printer for the entire job. It coordinates stored job data, scheduling, and handoff to the next stage.
How the pieces connect
A document can be accepted into a queue before the physical printer is ready to process it. The spooler maintains the information needed to track that work and routes it through the configured print components. Some rendering happens before spooling and some after, depending on the print architecture and the type of content submitted.
An everyday example
Sending a long document and then returning to a word processor is possible because the printing system can continue independently. If several programs submit jobs, their documents can wait in a controlled order. A network-shared queue adds another boundary: the local computer may hand work to a server before the destination equipment begins processing it.
Reading the information in context
A job disappearing from a local queue can mean it was passed onward, not necessarily that paper has already emerged. Conversely, a paused queue can stop new work without changing the printer's physical state. Queue observations need to be interpreted alongside the destination and connection. This page describes the roles rather than recommending service restarts or deletion of spool files.
Printers & Scanners
Note these before you change anything
Useful facts to have to hand while reading about what the print spooler does.
- Printer queue name and the port it uses
- Driver name: a built-in class driver or the maker's
- Whether the printer is reached by USB, IP address or name
- Default paper size and tray
Printers & Scanners: One common printing path (scanning runs the other way)
- Applicationsends a print job
- Print systemqueues and renders
- Printer driverbuilt-in class or vendor
- ConnectionUSB or network
- Printerproduces the page
