[metrics-bugs] #25161 [Metrics/CollecTor]: Fix another memory problem with the webstats bulk import

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#25161: Fix another memory problem with the webstats bulk import
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 Reporter:  karsten            |          Owner:  metrics-team
     Type:  defect             |         Status:  new
 Priority:  Medium             |      Milestone:
Component:  Metrics/CollecTor  |        Version:
 Severity:  Normal             |     Resolution:
 Keywords:                     |  Actual Points:
Parent ID:                     |         Points:
 Reviewer:                     |        Sponsor:
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Comment (by iwakeh):

 I didn't take a close look at the proposed code changes/additions, yet.
 In #25100 I suggested to partition the import by date, b/c that gives the
 reduction of heap usage and also is fine for the bulk import where we know
 one-file-one-date is true.

 > Or is this just the operation where we happen to run out of memory from
 accumulating stuff over time, and where fixing this issue would just mean
 that we're failing somewhere else, shortly after?

 I think this is the case.  We're also opposed to all other CollecTor
 modules compressing before writing.

 What heap setting is used, 8G?  How many cores are available?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25161#comment:1>
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