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![ruby on rails - H12 errors triggering a downward spiral of escalating memory on Heroku - Stack Overflow ruby on rails - H12 errors triggering a downward spiral of escalating memory on Heroku - Stack Overflow](https://i.stack.imgur.com/yAB53.png)
ruby on rails - H12 errors triggering a downward spiral of escalating memory on Heroku - Stack Overflow
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Why puma workers constantly hung, and how we fixed by discovering the bug of Ruby v2.5.8 and v2.6.6 | by Yohei Yoshimuta | ITNEXT
![ruby on rails - H12 errors triggering a downward spiral of escalating memory on Heroku - Stack Overflow ruby on rails - H12 errors triggering a downward spiral of escalating memory on Heroku - Stack Overflow](https://i.stack.imgur.com/ATEja.png)
ruby on rails - H12 errors triggering a downward spiral of escalating memory on Heroku - Stack Overflow
![Why puma workers constantly hung, and how we fixed by discovering the bug of Ruby v2.5.8 and v2.6.6 | by Yohei Yoshimuta | ITNEXT Why puma workers constantly hung, and how we fixed by discovering the bug of Ruby v2.5.8 and v2.6.6 | by Yohei Yoshimuta | ITNEXT](https://miro.medium.com/v2/resize:fit:1400/1*kB7rCM0XpoKHG2AIaddy0A.png)