[FEATURE] Reduce unittest time cost

[yhmo]

Is your feature request related to a problem? Please describe.
Now the milvus unittest totally cost about 16 minutes. I wish milvus unittest time cost can be reduce to less than 10 minutes

Describe the solution you'd like
Find out bottleneck and fix it.
A list of test case time cost:
[ OK ] DBTest.CONFIG_TEST (267 ms)
====[ OK ] DBTest.DB_TEST (13208 ms)
[ OK ] DBTest.SEARCH_TEST (3154 ms)
[ OK ] DBTest.PRELOADTABLE_TEST (2344 ms)
[ OK ] DBTest.SHUTDOWN_TEST (1080 ms)
==[ OK ] DBTest.INDEX_TEST (5266 ms)
[ OK ] DBTest2.ARHIVE_DISK_CHECK (2110 ms)
[ OK ] DBTest2.DELETE_TEST (4137 ms)
[ OK ] DBTest2.DELETE_BY_RANGE_TEST (2142 ms)
====[ OK ] MySqlDBTest.DB_TEST (36311 ms)
[ OK ] MySqlDBTest.SEARCH_TEST (4250 ms)
[ OK ] MySqlDBTest.ARHIVE_DISK_CHECK (2193 ms)
[ OK ] MySqlDBTest.DELETE_TEST (1160 ms)
[ OK ] EngineTest.FACTORY_TEST (1075 ms)
[ OK ] EngineTest.ENGINE_IMPL_TEST (1183 ms)
[ OK ] MemManagerTest.VECTOR_SOURCE_TEST (73 ms)
[ OK ] MemManagerTest.MEM_TABLE_FILE_TEST (1263 ms)
====[ OK ] MemManagerTest.MEM_TABLE_TEST (12986 ms)
==[ OK ] MemManagerTest2.SERIAL_INSERT_SEARCH_TEST (5296 ms)
==[ OK ] MemManagerTest2.INSERT_TEST (8906 ms)
====[ OK ] MemManagerTest2.CONCURRENT_INSERT_SEARCH_TEST (18072 ms)
==[ OK ] MemManagerTest2.VECTOR_IDS_TEST (6058 ms)
[ OK ] MetaTest.TABLE_TEST (75 ms)
[ OK ] MetaTest.TABLE_FILE_TEST (97 ms)
[ OK ] MetaTest.ARCHIVE_TEST_DAYS (1315 ms)
[ OK ] MetaTest.ARCHIVE_TEST_DISK (190 ms)
[ OK ] MetaTest.TABLE_FILES_TEST (420 ms)
[ OK ] MetaTest.INDEX_TEST (84 ms)
[ OK ] MySqlMetaTest.TABLE_TEST (162 ms)
[ OK ] MySqlMetaTest.TABLE_FILE_TEST (162 ms)
[ OK ] MySqlMetaTest.ARCHIVE_TEST_DAYS (1587 ms)
[ OK ] MySqlMetaTest.ARCHIVE_TEST_DISK (305 ms)
[ OK ] MySqlMetaTest.TABLE_FILES_TEST (514 ms)
[ OK ] MySqlMetaTest.INDEX_TEST (155 ms)
[ OK ] DBMiscTest.EXCEPTION_TEST (0 ms)
[ OK ] DBMiscTest.OPTIONS_TEST (0 ms)
[ OK ] DBMiscTest.META_TEST (40 ms)
[ OK ] DBMiscTest.UTILS_TEST (1 ms)
[ OK ] DBSearchTest.MERGE_RESULT_SET_TEST (4 ms)
[ OK ] DBSearchTest.REDUCE_PERF_TEST (4057 ms)
[ OK ] GPURESTEST.copyandsearch (1572 ms)
[ OK ] GPURESTEST.trainandsearch (1649 ms)
[ OK ] IDMAPTest.idmap_basic (228 ms)
[ OK ] IDMAPTest.idmap_serialize (48 ms)
[ OK ] IDMAPTest.copy_test (1269 ms)
==[ OK ] IVFParameters/IVFTest.ivf_basic/0 (5382 ms)
[ OK ] IVFParameters/IVFTest.ivf_basic/1 (1636 ms)
======[ OK ] IVFParameters/IVFTest.ivf_basic/2 (58760 ms)
======[ OK ] IVFParameters/IVFTest.ivf_basic/3 (53260 ms)
==[ OK ] IVFParameters/IVFTest.ivf_basic/4 (5855 ms)
[ OK ] IVFParameters/IVFTest.ivf_basic/5 (951 ms)
====[ OK ] IVFParameters/IVFTest.ivf_serialize/0 (11694 ms)
[ OK ] IVFParameters/IVFTest.ivf_serialize/1 (1288 ms)
======[ OK ] IVFParameters/IVFTest.ivf_serialize/2 (119152 ms)
======[ OK ] IVFParameters/IVFTest.ivf_serialize/3 (106097 ms)
====[ OK ] IVFParameters/IVFTest.ivf_serialize/4 (11010 ms)
[ OK ] IVFParameters/IVFTest.ivf_serialize/5 (1002 ms)
==[ OK ] IVFParameters/IVFTest.clone_test/0 (6460 ms)
[ OK ] IVFParameters/IVFTest.clone_test/1 (547 ms)
======[ OK ] IVFParameters/IVFTest.clone_test/2 (60657 ms)
======[ OK ] IVFParameters/IVFTest.clone_test/3 (54374 ms)
==[ OK ] IVFParameters/IVFTest.clone_test/4 (6714 ms)
[ OK ] IVFParameters/IVFTest.clone_test/5 (777 ms)
[ OK ] KDTTest.kdt_basic (3153 ms)
[ OK ] MetricbaseTest.METRICBASE_TEST (23 ms)
====[ OK ] MetricTest.METRIC_TEST (23858 ms)
[ OK ] MetricTest.COLLECTOR_METRICS_TEST (44 ms)
[ OK ] PrometheusTest.PROMETHEUS_TEST (211 ms)
======[ OK ] NSGInterfaceTest.basic_test (35344 ms)
[ OK ] AlgorithmTest.SHORTESTPATH_TEST (117 ms)
[ OK ] NodeTest.ADD_NEIGHBOUR (0 ms)
[ OK ] NodeTest.REPEAT_ADD_NEIGHBOUR (0 ms)
[ OK ] NodeTest.GET_NEIGHBOURS (0 ms)
[ OK ] NormalTest.INST_TEST (7 ms)
[ OK ] ResourceBaseTest.NAME (16 ms)
[ OK ] ResourceBaseTest.TYPE (16 ms)
[ OK ] ResourceBaseTest.DEVICE_ID (17 ms)
[ OK ] ResourceBaseTest.HAS_LOADER (16 ms)
[ OK ] ResourceBaseTest.HAS_EXECUTOR (17 ms)
[ OK ] ResourceAdvanceTest.DISK_RESOURCE_TEST (16 ms)
[ OK ] ResourceAdvanceTest.CPU_RESOURCE_TEST (17 ms)
[ OK ] ResourceAdvanceTest.GPU_RESOURCE_TEST (17 ms)
[ OK ] ResourceAdvanceTest.TEST_RESOURCE_TEST (16 ms)
[ OK ] ResourceFactoryTest.CREATE (11 ms)
[ OK ] ResourceMgrBaseTest.ADD (15 ms)
[ OK ] ResourceMgrBaseTest.ADD_DISK (15 ms)
[ OK ] ResourceMgrBaseTest.CONNECT (18 ms)
[ OK ] ResourceMgrBaseTest.INVALID_CONNECT (16 ms)
[ OK ] ResourceMgrBaseTest.CLEAR (8 ms)
[ OK ] ResourceMgrBaseTest.GET_DISK_RESOURCES (9 ms)
[ OK ] ResourceMgrBaseTest.GET_ALL_RESOURCES (9 ms)
[ OK ] ResourceMgrBaseTest.GET_COMPUTE_RESOURCES (9 ms)
[ OK ] ResourceMgrBaseTest.GET_RESOURCE_BY_TYPE_AND_DEVICEID (9 ms)
[ OK ] ResourceMgrBaseTest.GET_RESOURCE_BY_NAME (9 ms)
[ OK ] ResourceMgrBaseTest.GET_NUM_OF_RESOURCE (8 ms)
[ OK ] ResourceMgrBaseTest.GET_NUM_OF_COMPUTE_RESOURCE (9 ms)
[ OK ] ResourceMgrBaseTest.GET_NUM_OF_GPU_RESOURCE (9 ms)
[ OK ] ResourceMgrBaseTest.DUMP (8 ms)
[ OK ] ResourceMgrBaseTest.DUMP_TASKTABLES (9 ms)
[ OK ] ResourceMgrAdvanceTest.REGISTER_SUBSCRIBER (1010 ms)
[ OK ] SchedulerTest.ON_LOAD_COMPLETED (3073 ms)
[ OK ] SchedulerTest.PUSH_TASK_TO_NEIGHBOUR_RANDOMLY_TEST (3025 ms)
[ OK ] TaskTest.INVALID_INDEX (0 ms)
[ OK ] TaskTableItemTest.CONSTRUCT (0 ms)
[ OK ] TaskTableItemTest.DESTRUCT (0 ms)
[ OK ] TaskTableItemTest.IS_FINISH (0 ms)
[ OK ] TaskTableItemTest.DUMP (0 ms)
[ OK ] TaskTableItemTest.LOAD (0 ms)
[ OK ] TaskTableItemTest.LOADED (0 ms)
[ OK ] TaskTableItemTest.EXECUTE (0 ms)
[ OK ] TaskTableItemTest.EXECUTED (0 ms)
[ OK ] TaskTableItemTest.MOVE (0 ms)
[ OK ] TaskTableItemTest.MOVED (0 ms)
[ OK ] TaskTableBaseTest.SUBSCRIBER (4 ms)
[ OK ] TaskTableBaseTest.PUT_TASK (4 ms)
[ OK ] TaskTableBaseTest.PUT_INVALID_TEST (4 ms)
[ OK ] TaskTableBaseTest.PUT_BATCH (3 ms)
[ OK ] TaskTableBaseTest.SIZE (4 ms)
[ OK ] TaskTableBaseTest.OPERATOR (4 ms)
[ OK ] TaskTableBaseTest.PICK_TO_LOAD (4 ms)
[ OK ] TaskTableBaseTest.PICK_TO_LOAD_LIMIT (3 ms)
[ OK ] TaskTableBaseTest.PICK_TO_LOAD_CACHE (4 ms)
[ OK ] TaskTableBaseTest.PICK_TO_EXECUTE (4 ms)
[ OK ] TaskTableBaseTest.PICK_TO_EXECUTE_LIMIT (4 ms)
[ OK ] TaskTableBaseTest.PICK_TO_EXECUTE_CACHE (4 ms)
[ OK ] TaskTableAdvanceTest.LOAD (3 ms)
[ OK ] TaskTableAdvanceTest.LOADED (4 ms)
[ OK ] TaskTableAdvanceTest.EXECUTE (4 ms)
[ OK ] TaskTableAdvanceTest.EXECUTED (4 ms)
[ OK ] TaskTableAdvanceTest.MOVE (3 ms)
[ OK ] TaskTableAdvanceTest.MOVED (4 ms)
[ OK ] CacheTest.DUMMY_TEST (0 ms)
[ OK ] CacheTest.CPU_CACHE_TEST (4 ms)
[ OK ] CacheTest.GPU_CACHE_TEST (136 ms)
[ OK ] CacheTest.INVALID_TEST (2 ms)
[ OK ] ConfigTest.CONFIG_TEST (1 ms)
[ OK ] ConfigTest.SERVER_CONFIG_VALID_TEST (4 ms)
[ OK ] ConfigTest.SERVER_CONFIG_INVALID_TEST (2 ms)
[ OK ] ConfigTest.SERVER_CONFIG_TEST (4 ms)
[ OK ] RpcHandlerTest.HAS_TABLE_TEST (1061 ms)
[ OK ] RpcHandlerTest.INDEX_TEST (1060 ms)
[ OK ] RpcHandlerTest.INSERT_TEST (1063 ms)
[ OK ] RpcHandlerTest.SEARCH_TEST (1063 ms)
[ OK ] RpcHandlerTest.TABLES_TEST (1068 ms)
[ OK ] RpcHandlerTest.CMD_TEST (1061 ms)
[ OK ] RpcHandlerTest.DELETE_BY_RANGE_TEST (1060 ms)
[ OK ] RpcSchedulerTest.BASE_TASK_TEST (1 ms)
[ OK ] UtilTest.EXCEPTION_TEST (0 ms)
[ OK ] UtilTest.SIGNAL_TEST (0 ms)
[ OK ] UtilTest.COMMON_TEST (1 ms)
[ OK ] UtilTest.STRINGFUNCTIONS_TEST (0 ms)
[ OK ] UtilTest.BLOCKINGQUEUE_TEST (0 ms)
[ OK ] UtilTest.LOG_TEST (1 ms)
[ OK ] UtilTest.TIMERECORDER_TEST (0 ms)
[ OK ] UtilTest.STATUS_TEST (0 ms)
[ OK ] UtilTest.ROLLOUTHANDLER_TEST (1 ms)
[ OK ] ValidationUtilTest.VALIDATE_TABLENAME_TEST (1 ms)
[ OK ] ValidationUtilTest.VALIDATE_DIMENSION_TEST (0 ms)
[ OK ] ValidationUtilTest.VALIDATE_INDEX_TEST (0 ms)
[ OK ] ValidationUtilTest.VALIDATE_TOPK_TEST (0 ms)
[ OK ] ValidationUtilTest.VALIDATE_NPROBE_TEST (0 ms)
[ OK ] ValidationUtilTest.VALIDATE_GPU_TEST (2 ms)
[ OK ] ValidationUtilTest.VALIDATE_IPADDRESS_TEST (0 ms)
[ OK ] ValidationUtilTest.VALIDATE_NUMBER_TEST (0 ms)
[ OK ] ValidationUtilTest.VALIDATE_BOOL_TEST (0 ms)
[ OK ] ValidationUtilTest.VALIDATE_DOUBLE_TEST (0 ms)
[ OK ] ValidationUtilTest.VALIDATE_DBURI_TEST (0 ms)
[ OK ] KnowhereTest.KNOWHERE_RESOURCE_TEST (141 ms)
[ OK ] whatever.test_config (0 ms)
====[ OK ] WrapperParam/KnowhereWrapperTest.BASE_TEST/0 (13825 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.BASE_TEST/1 (1969 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.BASE_TEST/2 (1141 ms)
====[ OK ] WrapperParam/KnowhereWrapperTest.BASE_TEST/3 (16538 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.BASE_TEST/4 (1449 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.BASE_TEST/5 (1404 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.BASE_TEST/6 (238 ms)
====[ OK ] WrapperParam/KnowhereWrapperTest.TO_GPU_TEST/0 (14907 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.TO_GPU_TEST/1 (1859 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.TO_GPU_TEST/2 (1479 ms)
====[ OK ] WrapperParam/KnowhereWrapperTest.TO_GPU_TEST/3 (18195 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.TO_GPU_TEST/4 (1554 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.TO_GPU_TEST/5 (1503 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.TO_GPU_TEST/6 (888 ms)
====[ OK ] WrapperParam/KnowhereWrapperTest.SERIALIZE_TEST/0 (13620 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.SERIALIZE_TEST/1 (2005 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.SERIALIZE_TEST/2 (1349 ms)
====[ OK ] WrapperParam/KnowhereWrapperTest.SERIALIZE_TEST/3 (17714 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.SERIALIZE_TEST/4 (1513 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.SERIALIZE_TEST/5 (1491 ms)
[ OK ] WrapperParam/KnowhereWrapperTest.SERIALIZE_TEST/6 (442 ms)

'==' more than 5 seconds
'====' more than 10 seconds
'======' more than 30 seconds

[cydrain]

done