[Bug debuginfod/27323] New: concurrency during grooming/scanning

[fche at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27323

            Bug ID: 27323
           Summary: concurrency during grooming/scanning
           Product: elfutils
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: debuginfod
          Assignee: unassigned at sourceware dot org
          Reporter: fche at redhat dot com
                CC: elfutils-devel at sourceware dot org
  Target Milestone: ---

Further to bug #26775, which made grooming interruptible, we need more. 
Grooming involves some long-running operations, like the database-stats
count(*) queries, which can take MINUTES of run time on a large server. 
sqlite's single-thread-per-connection model means that during those times, web
queries cannot be served, and just pile up.

We need to add a little more concurrency to debuginfod, at the sqlite
connection level.

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