# Rack usage

**URL:** https://rubytalk.org/t/rack-usage/60730
**Category:** ruby-talk
**Created:** [5 November 2010 03:15 UTC](https://rubytalk.org/t/rack-usage/60730 "2010-11-05T03:15:35Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Mark\_T](https://avatars.discourse-cdn.com/v4/letter/m/a87d85/32.png) [@Mark\_T](https://rubytalk.org/u/Mark_T)
#### Post date: [5 November 2010 03:15 UTC](https://rubytalk.org/t/rack-usage/60730/1 "2010-11-05T03:15:35Z")

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How many Racks is it reasonable to have in a call stak?  
Rack is such a good thing.  
It is tempting to run a process with more than ten/twenty/th.....  
Is there a point where there could be:  
- a perfomance hit?  
- some sort of context switch issue?  
- out of memory issue?  
- debugging difficulties due to large tracebacks?  
- something else?

All.best!  
MarkT

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