nickva commented on PR #5399:
URL: https://github.com/apache/couchdb/pull/5399#issuecomment-2603132157
Another benchmark with concurrent reads on a 12 node cluster. This one
exercises concurrency but it's still reads only. So might not show the best
parts of the PR - how readers can read without waiting on writes to complete
but still shows a 40% improvement in requests per second (35k rps for `main`
and 50rps for `preads` branch).
Environment: Erlang 25, 12 node cluster, Debian 11, x86_64
Test parameters:
```
Concurrency (number of clients): 2000
Q: 64
Doc count: 1000000
Length: 1 hour
Config settings:
couchdb.max_dbs_open = true
ioq.bypass.db_update = true
ioq.bypass.interactive = true
```
Summary:
ops : number of get_doc operations completed in 1 hour
other times are in milliseconds
|release | ops | median | p75 | p90|
|------- | ---------- | -------| ------ | ----- |
|MAIN | 127701394 | 15469 | 21095 | 27490 |
|PREADS | 173440163 | 7595 | 18967 | 39236 |
<img width="789" alt="Screenshot 2025-01-20 at 2 28 13 PM"
src="https://github.com/user-attachments/assets/a1233cf1-759d-45d2-bf33-ca6629453253";
/>
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