# Jupyter notebook won't finish execution (\* symbol next to the cell no longer appears)

**URL:** <https://discourse.jupyter.org/t/jupyter-notebook-wont-finish-execution-symbol-next-to-the-cell-no-longer-appears/6740>\
**Category:** General\
**Created:** [November 13, 2020, 9:44pm UTC](https://discourse.jupyter.org/t/jupyter-notebook-wont-finish-execution-symbol-next-to-the-cell-no-longer-appears/6740 "2020-11-13T21:44:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Dan-Git-source](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/dan-git-source/32/3030_2.png) [@Dan-Git-source](https://discourse.jupyter.org/u/Dan-Git-source)\
**Post date:** [November 13, 2020, 9:44pm UTC](https://discourse.jupyter.org/t/jupyter-notebook-wont-finish-execution-symbol-next-to-the-cell-no-longer-appears/6740/1 "2020-11-13T21:44:58Z")

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I am running some python 3 code using a jupyter notebook. The notebook should take a couple of days to finish all computations. It, however, fails to finish execution. After a couple of running hours the \* symbol next to the cell no longer appears. Sometimes there is no error massage and sometimes it gives “Error rendering Jupyter widget.” I have deleted miniconda and reinstalled it but the issue remains. Any idea how to solve this?

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**Author:** ![fomightez](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/fomightez/32/495_2.png) [@fomightez](https://discourse.jupyter.org/u/fomightez)\
**Post date:** [November 13, 2020, 11:24pm UTC](https://discourse.jupyter.org/t/jupyter-notebook-wont-finish-execution-symbol-next-to-the-cell-no-longer-appears/6740/2 "2020-11-13T23:24:18Z")

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How are you monitoring your memory usage?

If you are using JupyterLab, there is a nice monitor that is part of the status bar along the bottom. See `Mem:` along the bottom of [this gif](https://discourse.jupyter.org/t/seeking-feedback-jupyterlab-single-document-mode-switch-position/6715) to get an idea of where to look.

If you are using the classic notebook interface maybe try `%memit` magic, see [here](https://timothymonteath.com/articles/monitoring_memory_usage/)? Or [nbresuse](https://pypi.org/project/nbresuse/)? Or try some [profiling](https://towardsdatascience.com/speed-up-jupyter-notebooks-20716cbe2025)?