Mercurial > p > roundup > code
annotate frontends/wsgi.py @ 6565:2c2dbfc332ba
Try to handle multiple connections better.
The session database is a hot spot. When multiple requests (e.g. 20)
come in at the same time session database contention can get great.
The original code didn't retry session database access when the open
failed. This resulted in errors at the client.
The second pass delayed 0.01 seconds and retried. It was better but we
still had multiple second stalls. I think the first request got in,
everybody else backed up and then retried at the same time. Again they
stepped on each other. With logging I would see many counters go all
the way to low single digits or to -1 indicating falure.
This pass uses randomint to generate delays from 0-.125 seconds in 5ms
increments. This performs better in testing. I rarely saw a counter
less than 13 (2 failed retries). Current logging starts after 6
failures and counts down until success or failure.
| author | John Rouillard <rouilj@ieee.org> |
|---|---|
| date | Thu, 16 Dec 2021 20:02:00 -0500 |
| parents | 7c852cad2ca8 |
| children | d32d43e4a5ba |
| rev | line source |
|---|---|
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
diff
changeset
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1 # If you installed roundup to the system locations |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
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2 # using pip you don't need to change this |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
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3 # section. If you installed roundup in a custom |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
diff
changeset
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4 # location, uncomment these lines and change the |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
diff
changeset
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5 # path in the append() method to your custom path. |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
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6 #import sys |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
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7 #sys.path.append('/custom/location/where/roundup/is/installed') |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
diff
changeset
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8 |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
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9 # Obtain the WSGI request dispatcher |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
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10 from roundup.cgi.wsgi_handler import RequestDispatcher |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
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11 |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
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12 # Set the path to tracker home. |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
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13 tracker_home = '/path/to/tracker' |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
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14 |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
diff
changeset
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15 # Definition signature for app: app(environ, start_response): |
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7c852cad2ca8
Add wsgi.py to frontends. Update docs.
John Rouillard <rouilj@ieee.org>
parents:
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changeset
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16 app = RequestDispatcher(tracker_home) |
