[tor-bugs] #24857 [Core Tor/Tor]: Tor uses 100% CPU when accessing the cache directory on Windows

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#24857: Tor uses 100% CPU when accessing the cache directory on Windows
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 Reporter:  Eugene646                            |          Owner:  (none)
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.4.4.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.3.1.9
 Severity:  Normal                               |     Resolution:
 Keywords:  044-should, cpu, windows, linux,     |  Actual Points:
  performance, regression, 033-triage-20180326,  |
  033-removed-20180326, 034-deferred-20180602,   |
  035-removed-20180711, 032-unreached-backport,  |
  040-roadmap-proposed, 033-unreached-backport-  |
  maybe, network-health                          |
Parent ID:  #25500                               |         Points:  2
 Reviewer:                                       |        Sponsor:
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Comment (by teor):

 A Windows relay operators has confirmed that setting DirCache 0 resolves
 this issue:
 https://lists.torproject.org/pipermail/tor-
 relays/2020-February/018165.html

 They can help test any Windows patches for this issue, once the patch is
 in the Tor Expert Bundle.
 So I guess that means a Tor Browser Alpha?

 Alternatively, as a workaround, we could make DirCache default to 0 on
 Windows. I'll open a child ticket.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24857#comment:56>
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