fix

Signed-off-by: xiaojun.lin <xiaojun.lin@zilliz.com>

CHANGELOG.md

@@ -36,6 +36,7 @@ Please mark all change in change log and use the issue from GitHub
 -   \#1507 set_config for insert_buffer_size is wrong
 -   \#1510 Add set interfaces for WAL configurations
 -   \#1511 Fix big integer cannot pass to server correctly
+-   \#1517 result is not correct when search vectors in multi partition, index type is RNSG 
 -   \#1518 Table count did not match after deleting vectors and compact
 -   \#1521 Make cache_insert_data take effect in-service
 -   \#1525 Add setter API for config preload_table

core/src/index/knowhere/knowhere/index/vector_index/nsg/NSG.cpp

@@ -698,13 +698,8 @@ NsgIndex::Search(const float* query, const unsigned& nq, const unsigned& dim, co
                  int64_t* ids, SearchParams& params) {
     std::vector<std::vector<Neighbor>> resset(nq);
 
-    if (k >= 45) {
-        params.search_length = k;
-    }
-
     TimeRecorder rc("NsgIndex::search", 1);
-    // TODO(linxj): when to use openmp
-    if (nq <= 4) {
+    if (nq == 1) {
         GetNeighbors(query, resset[0], nsg, &params);
     } else {
 #pragma omp parallel for

core/src/wrapper/ConfAdapter.cpp

@@ -225,7 +225,9 @@ NSGConfAdapter::CheckTrain(milvus::json& oricfg) {
 
     // auto tune params
     oricfg[knowhere::IndexParams::nlist] = MatchNlist(oricfg[knowhere::meta::ROWS].get<int64_t>(), 8192, 8192);
-    oricfg[knowhere::IndexParams::nprobe] = int(oricfg[knowhere::IndexParams::nlist].get<int64_t>() * 0.01);
+
+    int64_t nprobe = int(oricfg[knowhere::IndexParams::nlist].get<int64_t>() * 0.1);
+    oricfg[knowhere::IndexParams::nprobe] = nprobe < 1 ? 1 : nprobe;
 
     return true;
 }