Vertical size of Bokeh plots makes performance report illegible

What happened: Vertical size of Bokeh plots (Task Stream, Worker Profile, etc.) is extremely large and plots are therefore not legible. Zooming browser out to 25% still doesn’t get the whole plot in – and at that point text becomes impossible to read. Using Brave on OSX. Chrome is slightly better but not much.

What you expected to happen: Plots (both visuals and text) to be legible, ideally without having to zoom out.

Minimal Complete Verifiable Example:

import dask
from dask.distributed import performance_report, Client

client = Client(n_workers=50)
df = dask.datasets.timeseries('2000', '2001')
df = df.persist()

with performance_report(filename="dask-report.html"):
    df.groupby('name').x.mean().compute()

Anything else we need to know?:

Environment:

• Dask version: 2021.07.1
• Python version: 3.8
• Operating System: OS 11.3.1
• Install method (conda, pip, source): conda

Screenshot attached

[jrbourbeau]

There seem to be a couple of conversation threads happening at the same time. @rrpelgrim @ncclementi see https://github.com/dask/distributed/issues/5132#issuecomment-888497092 and https://github.com/dask/distributed/issues/5132#issuecomment-888527515 where we determined the issue is related to the size of the “Scheduler Logs” panel. You can increase the number of workers (e.g. Client(n_workers=50)) which will increase the size of the scheduler logs and result in the vertical size issue appearing

[jrbourbeau]

yup, using Client(n_workers=100) on main with bokeh 2.3.3 causes the problem.

Thanks @gjoseph92 for confirming the scheduler log tab is the issue

I’d say that with the example above, I noticed that when reducing the window size, there is a moment that it stops scaling the plot and cuts it off, so you would need to scroll.

Good observation. This is probably a good thing as, for very small screens, scrolling seems like a more legible alternative to having super tiny figures. I think what we want is to have the scheduler log tab follow a stretch_both sizing mode where it’s doesn’t result in other panels in the tabs being elongated. cc @charlesbluca for the scheduler logs connection and @bryevdv for visibility