From 3056efda01de9d89c34298ad6e7fac7c078d19cd Mon Sep 17 00:00:00 2001
From: starlord <chxiehust@gmail.com>
Date: Thu, 8 Aug 2019 10:37:01 +0800
Subject: [PATCH] MS-312 Set openmp thread number by config

Former-commit-id: 511a0da7d85a341c0970f2e5823152b5ae2c71db
---
 cpp/src/server/DBWrapper.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cpp/src/server/DBWrapper.cpp b/cpp/src/server/DBWrapper.cpp
index 4487a37e19..fbe630a803 100644
--- a/cpp/src/server/DBWrapper.cpp
+++ b/cpp/src/server/DBWrapper.cpp
@@ -66,6 +66,12 @@ DBWrapper::DBWrapper() {
     if(omp_thread > 0) {
         omp_set_num_threads(omp_thread);
         SERVER_LOG_DEBUG << "Specify openmp thread number: " << omp_thread;
+    } else {
+        uint32_t sys_thread_cnt = 8;
+        if(CommonUtil::GetSystemAvailableThreads(sys_thread_cnt)) {
+            omp_thread = (int32_t)ceil(sys_thread_cnt*0.5);
+            omp_set_num_threads(omp_thread);
+        }
     }
 
     //set archive config