arup-chauhan opened a new pull request, #4616:
URL: https://github.com/apache/solr/pull/4616
This PR adds benchmark coverage for multithreaded search as a baseline
measurement for SOLR-17841.
Scope is intentionally limited to a single benchmark file. No production
code is changed. The goal is to establish reproducible, comparable numbers
before any fix is attempted.
## Changes
Modified `ExitableDirectoryReaderSearch.java` in `solr/benchmark`:
- Added `@Param({"false", "true"}) boolean multiThreaded` to `BenchState`.
JMH will now cycle through both normal and multithreaded mode for every
benchmark automatically.
- Updated `createInitialParams()` to accept `BenchState` and conditionally
set `multiThreaded=true` via `CommonParams.MULTI_THREADED`.
- Added a new `@Benchmark` method `testRangeQuery` querying `id:[0 TO
250000]`, a numeric range covering half of the 500k indexed documents,
targeting the specific query type reported as ~5x slower under multithreaded
search.
## Validation
- `./gradlew :solr:benchmark:compileJava`
- `./gradlew tidy`
- `./gradlew check -x test`
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