tpunder commented on code in PR #1861:
URL: https://github.com/apache/solr/pull/1861#discussion_r1302272877
##########
solr/core/src/java/org/apache/solr/core/QuerySenderListener.java:
##########
@@ -44,65 +53,131 @@ public QuerySenderListener(SolrCore core) {
@Override
public void newSearcher(SolrIndexSearcher newSearcher, SolrIndexSearcher
currentSearcher) {
+ final long startTimeNanos = System.nanoTime();
+
final SolrIndexSearcher searcher = newSearcher;
log.debug("QuerySenderListener sending requests to {}", newSearcher);
@SuppressWarnings("unchecked")
List<NamedList<Object>> allLists =
convertQueriesToList((ArrayList<Object>) getArgs().getAll("queries"));
if (allLists == null) return;
- for (NamedList<Object> nlst : allLists) {
+ final int threads = getThreadsParam();
+
+ if (0 == threads || 1 == threads || allLists.isEmpty()) { // Non-threaded
code path
+ for (NamedList<Object> nlst : allLists) {
+ runQuery(newSearcher, currentSearcher, nlst);
+ }
+ } else { // Multi-threaded code path
+ final int nThreads = threads > 0 ? threads :
Runtime.getRuntime().availableProcessors();
Review Comment:
My intent is that negative numbers will default to using the number of
available processors. However, I originally was not catching `0 == threads` but
later decided that it made more sense to treat `0 == threads` as meaning "no
threading". That behavior seems more consistent with the `facet.threads`
parameter which has the similar behavior for a value of 0 and negative values.
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