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We're able to harvest all data set we have, which is 7.2 M records with different "Max records per response" parameter value.
Possibly there's a memory leak on oai-pmh side as we've seen continuously growing memory and CPU usage (see screenshots below).
Tests and results
| test | Max records per response | Time to complete | Result | Issues |
|---|---|---|---|---|
| 1 | 100 | 6 hours 26 minutes | all data harvested | Growing CPU/RAM usage |
| 2 | 300 | 2 hours 31 min | 5.5 M records harvested | connection lost with load generator not an oai-pmh issue |
| 3 | 500 | 2 hour 27 min | all data harvested | Growing CPU/RAM usage |
Service CPU usage
Service Memory usage
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mod-inventory-storage memory usage
Heap Analysis
There's 2 issues as a leak suspects common for each heap dumps taken (after each test):
io.vertx.core.http.impl.HttpClientImpl:
There is growing instances number 7 347 → 13 248 → 20 664;
io.vertx.core.http.impl.ConnectionManager:
There is growing instances number 14 694 →26 514 → 41 328;
