diff --git a/trunk/src/app/srs_app_conn.cpp b/trunk/src/app/srs_app_conn.cpp
index ecaed2168..d42d4de18 100644
--- a/trunk/src/app/srs_app_conn.cpp
+++ b/trunk/src/app/srs_app_conn.cpp
@@ -37,7 +37,7 @@ SrsConnection::SrsConnection(SrsServer* srs_server, st_netfd_t client_stfd)
     // so we never use joinable.
     // TODO: FIXME: maybe other thread need to stop it.
     // @see: https://github.com/winlinvip/simple-rtmp-server/issues/78
-    pthread = new SrsThread(this, 0, false);
+    pthread = new SrsThread("conn", this, 0, false);
 }
 
 SrsConnection::~SrsConnection()
diff --git a/trunk/src/app/srs_app_edge.cpp b/trunk/src/app/srs_app_edge.cpp
index 78dd39cd8..37d9ef941 100644
--- a/trunk/src/app/srs_app_edge.cpp
+++ b/trunk/src/app/srs_app_edge.cpp
@@ -69,7 +69,7 @@ SrsEdgeIngester::SrsEdgeIngester()
     origin_index = 0;
     stream_id = 0;
     stfd = NULL;
-    pthread = new SrsThread(this, SRS_EDGE_INGESTER_SLEEP_US, true);
+    pthread = new SrsThread("edge-igs", this, SRS_EDGE_INGESTER_SLEEP_US, true);
 }
 
 SrsEdgeIngester::~SrsEdgeIngester()
@@ -386,7 +386,7 @@ SrsEdgeForwarder::SrsEdgeForwarder()
     origin_index = 0;
     stream_id = 0;
     stfd = NULL;
-    pthread = new SrsThread(this, SRS_EDGE_FORWARDER_SLEEP_US, true);
+    pthread = new SrsThread("edge-fwr", this, SRS_EDGE_FORWARDER_SLEEP_US, true);
     queue = new SrsMessageQueue();
     send_error_code = ERROR_SUCCESS;
 }
diff --git a/trunk/src/app/srs_app_encoder.cpp b/trunk/src/app/srs_app_encoder.cpp
index 6aedcd152..25d62063f 100644
--- a/trunk/src/app/srs_app_encoder.cpp
+++ b/trunk/src/app/srs_app_encoder.cpp
@@ -44,7 +44,7 @@ static std::vector<std::string> _transcoded_url;
 
 SrsEncoder::SrsEncoder()
 {
-    pthread = new SrsThread(this, SRS_RTMP_ENCODER_SLEEP_US, true);
+    pthread = new SrsThread("encoder", this, SRS_RTMP_ENCODER_SLEEP_US, true);
     pithy_print = new SrsPithyPrint(SRS_CONSTS_STAGE_ENCODER);
 }
 
diff --git a/trunk/src/app/srs_app_forward.cpp b/trunk/src/app/srs_app_forward.cpp
index 1c1dbb2d5..52b62256b 100644
--- a/trunk/src/app/srs_app_forward.cpp
+++ b/trunk/src/app/srs_app_forward.cpp
@@ -58,7 +58,7 @@ SrsForwarder::SrsForwarder(SrsSource* _source)
     kbps = new SrsKbps();
     stream_id = 0;
 
-    pthread = new SrsThread(this, SRS_FORWARDER_SLEEP_US, true);
+    pthread = new SrsThread("forward", this, SRS_FORWARDER_SLEEP_US, true);
     queue = new SrsMessageQueue();
     jitter = new SrsRtmpJitter();
     
diff --git a/trunk/src/app/srs_app_ingest.cpp b/trunk/src/app/srs_app_ingest.cpp
index 7c5f6a1de..6658dddc4 100644
--- a/trunk/src/app/srs_app_ingest.cpp
+++ b/trunk/src/app/srs_app_ingest.cpp
@@ -36,7 +36,7 @@ using namespace std;
 
 // when error, ingester sleep for a while and retry.
 // ingest never sleep a long time, for we must start the stream ASAP.
-#define SRS_AUTO_INGESTER_SLEEP_US (int64_t)(6*100*1000LL)
+#define SRS_AUTO_INGESTER_SLEEP_US (int64_t)(3*1000*1000LL)
 
 SrsIngesterFFMPEG::SrsIngesterFFMPEG(SrsFFMPEG* _ffmpeg, string _vhost, string _id)
 {
@@ -54,7 +54,7 @@ SrsIngester::SrsIngester()
 {
     _srs_config->subscribe(this);
     
-    pthread = new SrsThread(this, SRS_AUTO_INGESTER_SLEEP_US, true);
+    pthread = new SrsThread("ingest", this, SRS_AUTO_INGESTER_SLEEP_US, true);
     pithy_print = new SrsPithyPrint(SRS_CONSTS_STAGE_INGESTER);
 }
 
diff --git a/trunk/src/app/srs_app_recv_thread.cpp b/trunk/src/app/srs_app_recv_thread.cpp
index 4a2b02723..8ab29ebc3 100644
--- a/trunk/src/app/srs_app_recv_thread.cpp
+++ b/trunk/src/app/srs_app_recv_thread.cpp
@@ -40,7 +40,7 @@ SrsRecvThread::SrsRecvThread(ISrsMessageHandler* msg_handler, SrsRtmpServer* rtm
     timeout = timeout_ms;
     handler = msg_handler;
     rtmp = rtmp_sdk;
-    trd = new SrsThread(this, 0, true);
+    trd = new SrsThread("recv", this, 0, true);
 }
 
 SrsRecvThread::~SrsRecvThread()
diff --git a/trunk/src/app/srs_app_server.cpp b/trunk/src/app/srs_app_server.cpp
index bb1d29ed5..b1d4abd5c 100644
--- a/trunk/src/app/srs_app_server.cpp
+++ b/trunk/src/app/srs_app_server.cpp
@@ -53,9 +53,9 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 // system interval in ms,
 // all resolution times should be times togother,
-// for example, system-time is 3(300ms),
-// then rusage can be 3*x, for instance, 3*10=30(3s),
-// the meminfo canbe 30*x, for instance, 30*2=60(6s)
+// for example, system-interval is x=1s(1000ms),
+// then rusage can be 3*x, for instance, 3*1=3s,
+// the meminfo canbe 6*x, for instance, 6*1=6s,
 // for performance refine, @see: https://github.com/winlinvip/simple-rtmp-server/issues/194
 // @remark, recomment to 1000ms.
 #define SRS_SYS_CYCLE_INTERVAL 1000
@@ -63,7 +63,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // update time interval:
 //      SRS_SYS_CYCLE_INTERVAL * SRS_SYS_TIME_RESOLUTION_MS_TIMES
 // @see SYS_TIME_RESOLUTION_US
-#define SRS_SYS_TIME_RESOLUTION_MS_TIMES 3
+#define SRS_SYS_TIME_RESOLUTION_MS_TIMES 1
 
 // update rusage interval:
 //      SRS_SYS_CYCLE_INTERVAL * SRS_SYS_RUSAGE_RESOLUTION_TIMES
@@ -102,7 +102,7 @@ SrsListener::SrsListener(SrsServer* server, SrsListenerType type)
     _server = server;
     _type = type;
 
-    pthread = new SrsThread(this, 0, true);
+    pthread = new SrsThread("listen", this, 0, true);
 }
 
 SrsListener::~SrsListener()
@@ -215,7 +215,7 @@ SrsSignalManager::SrsSignalManager(SrsServer* server)
     
     _server = server;
     sig_pipe[0] = sig_pipe[1] = -1;
-    pthread = new SrsThread(this, 0, true);
+    pthread = new SrsThread("signal", this, 0, true);
     signal_read_stfd = NULL;
 }
 
@@ -714,7 +714,7 @@ int SrsServer::do_cycle()
                 srs_trace("reload config success.");
             }
             
-            // update the cache time or rusage.
+            // update the cache time
             if ((i % SRS_SYS_TIME_RESOLUTION_MS_TIMES) == 0) {
                 srs_info("update current time cache.");
                 srs_update_system_time_ms();
diff --git a/trunk/src/app/srs_app_thread.cpp b/trunk/src/app/srs_app_thread.cpp
index 857f5fe8e..74dcfeeb4 100644
--- a/trunk/src/app/srs_app_thread.cpp
+++ b/trunk/src/app/srs_app_thread.cpp
@@ -54,8 +54,9 @@ void ISrsThreadHandler::on_thread_stop()
 {
 }
 
-SrsThread::SrsThread(ISrsThreadHandler* thread_handler, int64_t interval_us, bool joinable)
+SrsThread::SrsThread(const char* name, ISrsThreadHandler* thread_handler, int64_t interval_us, bool joinable)
 {
+    _name = name;
     handler = thread_handler;
     cycle_interval_us = interval_us;
     
@@ -86,7 +87,7 @@ int SrsThread::start()
     int ret = ERROR_SUCCESS;
     
     if(tid) {
-        srs_info("thread already running.");
+        srs_info("thread %s already running.", _name);
         return ret;
     }
     
@@ -141,7 +142,7 @@ void SrsThread::thread_cycle()
     int ret = ERROR_SUCCESS;
     
     _srs_context->generate_id();
-    srs_info("thread cycle start");
+    srs_info("thread %s cycle start", _name);
     
     _cid = _srs_context->get_id();
     
@@ -155,24 +156,24 @@ void SrsThread::thread_cycle()
     
     while (loop) {
         if ((ret = handler->on_before_cycle()) != ERROR_SUCCESS) {
-            srs_warn("thread on before cycle failed, ignored and retry, ret=%d", ret);
+            srs_warn("thread %s on before cycle failed, ignored and retry, ret=%d", _name, ret);
             goto failed;
         }
-        srs_info("thread on before cycle success");
+        srs_info("thread %s on before cycle success");
         
         if ((ret = handler->cycle()) != ERROR_SUCCESS) {
             if (!srs_is_client_gracefully_close(ret)) {
-                srs_warn("thread cycle failed, ignored and retry, ret=%d", ret);
+                srs_warn("thread cycle failed, ignored and retry, ret=%d", _name, ret);
             }
             goto failed;
         }
-        srs_info("thread cycle success");
+        srs_info("thread %s cycle success", _name);
         
         if ((ret = handler->on_end_cycle()) != ERROR_SUCCESS) {
-            srs_warn("thread on end cycle failed, ignored and retry, ret=%d", ret);
+            srs_warn("thread %s on end cycle failed, ignored and retry, ret=%d", _name, ret);
             goto failed;
         }
-        srs_info("thread on end cycle success");
+        srs_info("thread %s on end cycle success", _name);
 
 failed:
         if (!loop) {
@@ -187,7 +188,7 @@ failed:
     }
     
     handler->on_thread_stop();
-    srs_info("thread cycle finished");
+    srs_info("thread %s cycle finished", _name);
 }
 
 void* SrsThread::thread_fun(void* arg)
diff --git a/trunk/src/app/srs_app_thread.hpp b/trunk/src/app/srs_app_thread.hpp
index debfd216f..347e6ceae 100644
--- a/trunk/src/app/srs_app_thread.hpp
+++ b/trunk/src/app/srs_app_thread.hpp
@@ -88,23 +88,26 @@ private:
     bool loop;
     bool can_run;
     bool _joinable;
+    const char* _name;
 private:
     ISrsThreadHandler* handler;
     int64_t cycle_interval_us;
 public:
     /**
     * initialize the thread.
+    * @param name, human readable name for st debug.
     * @param thread_handler, the cycle handler for the thread.
     * @param interval_us, the sleep interval when cycle finished.
     * @param joinable, if joinable, other thread must stop the thread.
     * @remark if joinable, thread never quit itself, or memory leak. 
     * @see: https://github.com/winlinvip/simple-rtmp-server/issues/78
+    * @remark about st debug, see st-1.9/README, _st_iterate_threads_flag
     */
     /**
     * TODO: FIXME: maybe all thread must be reap by others threads, 
     * @see: https://github.com/winlinvip/simple-rtmp-server/issues/77
     */
-    SrsThread(ISrsThreadHandler* thread_handler, int64_t interval_us, bool joinable);
+    SrsThread(const char* name, ISrsThreadHandler* thread_handler, int64_t interval_us, bool joinable);
     virtual ~SrsThread();
 public:
     /**