diff --git a/trunk/3rdparty/st-srs/Makefile b/trunk/3rdparty/st-srs/Makefile
index 7102eedb4..71f96ba4e 100644
--- a/trunk/3rdparty/st-srs/Makefile
+++ b/trunk/3rdparty/st-srs/Makefile
@@ -286,6 +286,9 @@ endif
 #
 # make EXTRA_CFLAGS="-DMD_HAVE_SENDMMSG -D_GNU_SOURCE"
 #
+# or to enable stats for ST:
+#
+# make EXTRA_CFLAGS=-DDEBUG_STATS
 ##########################
 
 CFLAGS      += $(DEFINES) $(OTHER_FLAGS) $(EXTRA_CFLAGS)
diff --git a/trunk/3rdparty/st-srs/event.c b/trunk/3rdparty/st-srs/event.c
index 82354e174..4b54e69ef 100644
--- a/trunk/3rdparty/st-srs/event.c
+++ b/trunk/3rdparty/st-srs/event.c
@@ -48,7 +48,7 @@
 #endif
 
 // Global stat.
-#ifdef DEBUG
+#if defined(DEBUG) && defined(DEBUG_STATS)
 unsigned long long _st_stat_epoll = 0;
 unsigned long long _st_stat_epoll_zero = 0;
 unsigned long long _st_stat_epoll_shake = 0;
@@ -1213,7 +1213,7 @@ ST_HIDDEN void _st_epoll_dispatch(void)
     int events, op;
     short revents;
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_epoll;
     #endif
 
@@ -1225,12 +1225,12 @@ ST_HIDDEN void _st_epoll_dispatch(void)
 
         // At least wait 1ms when <1ms, to avoid epoll_wait spin loop.
         if (timeout == 0) {
-            #ifdef DEBUG
+            #if defined(DEBUG) && defined(DEBUG_STATS)
             ++_st_stat_epoll_zero;
             #endif
 
             if (min_timeout > 0) {
-                #ifdef DEBUG
+                #if defined(DEBUG) && defined(DEBUG_STATS)
                 ++_st_stat_epoll_shake;
                 #endif
 
@@ -1262,7 +1262,7 @@ ST_HIDDEN void _st_epoll_dispatch(void)
     /* Check for I/O operations */
     nfd = epoll_wait(_st_epoll_data->epfd, _st_epoll_data->evtlist, _st_epoll_data->evtlist_size, timeout);
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     if (nfd <= 0) {
         ++_st_stat_epoll_spin;
     }
diff --git a/trunk/3rdparty/st-srs/io.c b/trunk/3rdparty/st-srs/io.c
index 244db5a62..da9184091 100644
--- a/trunk/3rdparty/st-srs/io.c
+++ b/trunk/3rdparty/st-srs/io.c
@@ -53,7 +53,7 @@
 #include "common.h"
 
 // Global stat.
-#ifdef DEBUG
+#if defined(DEBUG) && defined(DEBUG_STATS)
 unsigned long long _st_stat_recvfrom = 0;
 unsigned long long _st_stat_recvfrom_eagain = 0;
 unsigned long long _st_stat_sendto = 0;
@@ -457,7 +457,7 @@ ssize_t st_read(_st_netfd_t *fd, void *buf, size_t nbyte, st_utime_t timeout)
 {
     ssize_t n;
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_read;
     #endif
     
@@ -467,7 +467,7 @@ ssize_t st_read(_st_netfd_t *fd, void *buf, size_t nbyte, st_utime_t timeout)
         if (!_IO_NOT_READY_ERROR)
             return -1;
 
-        #ifdef DEBUG
+        #if defined(DEBUG) && defined(DEBUG_STATS)
         ++_st_stat_read_eagain;
         #endif
 
@@ -499,7 +499,7 @@ ssize_t st_readv(_st_netfd_t *fd, const struct iovec *iov, int iov_size, st_utim
 {
     ssize_t n;
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_readv;
     #endif
     
@@ -509,7 +509,7 @@ ssize_t st_readv(_st_netfd_t *fd, const struct iovec *iov, int iov_size, st_utim
         if (!_IO_NOT_READY_ERROR)
             return -1;
 
-        #ifdef DEBUG
+        #if defined(DEBUG) && defined(DEBUG_STATS)
         ++_st_stat_readv_eagain;
         #endif
 
@@ -610,7 +610,7 @@ ssize_t st_writev(_st_netfd_t *fd, const struct iovec *iov, int iov_size, st_uti
     tmp_iov = (struct iovec *) iov;    /* we promise not to modify iov */
     iov_cnt = iov_size;
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_writev;
     #endif
     
@@ -658,7 +658,7 @@ ssize_t st_writev(_st_netfd_t *fd, const struct iovec *iov, int iov_size, st_uti
             }
         }
 
-        #ifdef DEBUG
+        #if defined(DEBUG) && defined(DEBUG_STATS)
         ++_st_stat_writev_eagain;
         #endif
 
@@ -680,7 +680,7 @@ int st_writev_resid(_st_netfd_t *fd, struct iovec **iov, int *iov_size, st_utime
 {
     ssize_t n;
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_writev;
     #endif
     
@@ -710,7 +710,7 @@ int st_writev_resid(_st_netfd_t *fd, struct iovec **iov, int *iov_size, st_utime
             (*iov)->iov_len -= n;
         }
 
-        #ifdef DEBUG
+        #if defined(DEBUG) && defined(DEBUG_STATS)
         ++_st_stat_writev_eagain;
         #endif
 
@@ -730,7 +730,7 @@ int st_recvfrom(_st_netfd_t *fd, void *buf, int len, struct sockaddr *from, int
 {
     int n;
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_recvfrom;
     #endif
 
@@ -740,7 +740,7 @@ int st_recvfrom(_st_netfd_t *fd, void *buf, int len, struct sockaddr *from, int
         if (!_IO_NOT_READY_ERROR)
             return -1;
 
-        #ifdef DEBUG
+        #if defined(DEBUG) && defined(DEBUG_STATS)
         ++_st_stat_recvfrom_eagain;
         #endif
 
@@ -757,7 +757,7 @@ int st_sendto(_st_netfd_t *fd, const void *msg, int len, const struct sockaddr *
 {
     int n;
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_sendto;
     #endif
     
@@ -767,7 +767,7 @@ int st_sendto(_st_netfd_t *fd, const void *msg, int len, const struct sockaddr *
         if (!_IO_NOT_READY_ERROR)
             return -1;
 
-        #ifdef DEBUG
+        #if defined(DEBUG) && defined(DEBUG_STATS)
         ++_st_stat_sendto_eagain;
         #endif
 
@@ -784,7 +784,7 @@ int st_recvmsg(_st_netfd_t *fd, struct msghdr *msg, int flags, st_utime_t timeou
 {
     int n;
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_recvmsg;
     #endif
     
@@ -794,7 +794,7 @@ int st_recvmsg(_st_netfd_t *fd, struct msghdr *msg, int flags, st_utime_t timeou
         if (!_IO_NOT_READY_ERROR)
             return -1;
 
-        #ifdef DEBUG
+        #if defined(DEBUG) && defined(DEBUG_STATS)
         ++_st_stat_recvmsg_eagain;
         #endif
 
@@ -811,7 +811,7 @@ int st_sendmsg(_st_netfd_t *fd, const struct msghdr *msg, int flags, st_utime_t
 {
     int n;
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_sendmsg;
     #endif
     
@@ -821,7 +821,7 @@ int st_sendmsg(_st_netfd_t *fd, const struct msghdr *msg, int flags, st_utime_t
         if (!_IO_NOT_READY_ERROR)
             return -1;
 
-        #ifdef DEBUG
+        #if defined(DEBUG) && defined(DEBUG_STATS)
         ++_st_stat_sendmsg_eagain;
         #endif
 
@@ -840,7 +840,7 @@ int st_sendmmsg(st_netfd_t fd, struct st_mmsghdr *msgvec, unsigned int vlen, int
     int left;
     struct mmsghdr *p;
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_sendmmsg;
     #endif
 
@@ -854,7 +854,7 @@ int st_sendmmsg(st_netfd_t fd, struct st_mmsghdr *msgvec, unsigned int vlen, int
             if (!_IO_NOT_READY_ERROR)
                 break;
 
-            #ifdef DEBUG
+            #if defined(DEBUG) && defined(DEBUG_STATS)
             ++_st_stat_sendmmsg_eagain;
             #endif
 
diff --git a/trunk/3rdparty/st-srs/sched.c b/trunk/3rdparty/st-srs/sched.c
index f69df556c..80d0e3968 100644
--- a/trunk/3rdparty/st-srs/sched.c
+++ b/trunk/3rdparty/st-srs/sched.c
@@ -53,7 +53,7 @@
 #endif
 
 // Global stat.
-#ifdef DEBUG
+#if defined(DEBUG) && defined(DEBUG_STATS)
 unsigned long long _st_stat_sched_15ms = 0;
 unsigned long long _st_stat_sched_20ms = 0;
 unsigned long long _st_stat_sched_25ms = 0;
@@ -136,7 +136,7 @@ void _st_vp_schedule(void)
     _st_thread_t *thread;
     
     if (_ST_RUNQ.next != &_ST_RUNQ) {
-        #ifdef DEBUG
+        #if defined(DEBUG) && defined(DEBUG_STATS)
         ++_st_stat_thread_run;
         #endif
 
@@ -144,7 +144,7 @@ void _st_vp_schedule(void)
         thread = _ST_THREAD_PTR(_ST_RUNQ.next);
         _ST_DEL_RUNQ(thread);
     } else {
-        #ifdef DEBUG
+        #if defined(DEBUG) && defined(DEBUG_STATS)
         ++_st_stat_thread_idle;
         #endif
 
@@ -509,7 +509,7 @@ void _st_vp_check_clock(void)
     elapsed = now < _ST_LAST_CLOCK? 0 : now - _ST_LAST_CLOCK; // Might step back.
     _ST_LAST_CLOCK = now;
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     if (elapsed <= 10000) {
         ++_st_stat_sched_15ms;
     } else if (elapsed <= 21000) {
@@ -560,7 +560,7 @@ void st_thread_yield()
 {
     _st_thread_t *me = _ST_CURRENT_THREAD();
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_thread_yield;
     #endif
 
@@ -572,7 +572,7 @@ void st_thread_yield()
         return;
     }
 
-    #ifdef DEBUG
+    #if defined(DEBUG) && defined(DEBUG_STATS)
     ++_st_stat_thread_yield2;
     #endif
 
diff --git a/trunk/auto/auto_headers.sh b/trunk/auto/auto_headers.sh
index 0229996ea..19498237c 100755
--- a/trunk/auto/auto_headers.sh
+++ b/trunk/auto/auto_headers.sh
@@ -193,6 +193,12 @@ else
     srs_undefine_macro "SRS_DEBUG" $SRS_AUTO_HEADERS_H
 fi
 
+if [ $SRS_DEBUG_STATS = YES ]; then
+    srs_define_macro "SRS_DEBUG_STATS" $SRS_AUTO_HEADERS_H
+else
+    srs_undefine_macro "SRS_DEBUG_STATS" $SRS_AUTO_HEADERS_H
+fi
+
 # prefix
 echo "" >> $SRS_AUTO_HEADERS_H
 echo "#define SRS_PREFIX \"${SRS_PREFIX}\"" >> $SRS_AUTO_HEADERS_H
diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index ee7d228d0..11b5785d0 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -347,6 +347,10 @@ else
     echo "Build ST without UDP sendmmsg support."
     _ST_EXTRA_CFLAGS="$_ST_EXTRA_CFLAGS -UMD_HAVE_SENDMMSG -U_GNU_SOURCE"
 fi
+# Whether enable debug stats.
+if [[ $SRS_DEBUG_STATS == YES ]]; then
+    _ST_EXTRA_CFLAGS="$_ST_EXTRA_CFLAGS -DDEBUG_STATS"
+fi
 # Always alloc on heap, @see https://github.com/ossrs/srs/issues/509#issuecomment-719931676
 _ST_EXTRA_CFLAGS="$_ST_EXTRA_CFLAGS -DMALLOC_STACK"
 # Pass the global extra flags.
diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
index 23aab3509..a727e5513 100755
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -133,6 +133,7 @@ SRS_NASM=YES
 SRS_SRTP_ASM=YES
 SRS_SENDMMSG=NO
 SRS_DEBUG=NO
+SRS_DEBUG_STATS=NO
 
 #####################################################################################
 # menu
@@ -162,6 +163,7 @@ Features:
   --prefix=<path>           The absolute installation path. Default: $SRS_PREFIX
   --gcov=on|off             Whether enable the GCOV compiler options. Default: $(value2switch $SRS_GCOV)
   --debug=on|off            Whether enable the debug code, may hurt performance. Default: $(value2switch $SRS_DEBUG)
+  --debug-stats=on|off      Whether enable the debug stats, may hurt performance. Default: $(value2switch $SRS_DEBUG_STATS)
   --jobs[=N]                Allow N jobs at once; infinite jobs with no arg. Default: $SRS_JOBS
   --log-verbose             Whether enable the log verbose level. Default: $(value2switch $SRS_LOG_VERBOSE)
   --log-info                Whether enable the log info level. Default: $(value2switch $SRS_LOG_INFO)
@@ -222,7 +224,8 @@ function parse_user_option() {
         --log-info)                     SRS_LOG_INFO=YES            ;;
         --log-trace)                    SRS_LOG_TRACE=YES           ;;
         --gcov)                         SRS_GCOV=YES                ;;
-        --debug)                        SRS_DEBUG=YES               ;;
+        --debug)                        if [[ $value == off ]]; then SRS_DEBUG=NO; else SRS_DEBUG=YES; fi    ;;
+        --debug-stats)                  if [[ $value == off ]]; then SRS_DEBUG_STATS=NO; else SRS_DEBUG_STATS=YES; fi    ;;
 
         --arm)                          SRS_CROSS_BUILD=YES         ;;
         --mips)                         SRS_CROSS_BUILD=YES         ;;
@@ -572,7 +575,8 @@ function regenerate_options() {
     if [ $SRS_LOG_INFO = YES ]; then        SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --log-info"; fi
     if [ $SRS_LOG_TRACE = YES ]; then       SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --log-trace"; fi
     if [ $SRS_GCOV = YES ]; then            SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --gcov"; fi
-    if [ $SRS_DEBUG = YES ]; then           SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --debug"; fi
+    if [ $SRS_DEBUG = YES ]; then           SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --debug=on"; else              SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --debug=off"; fi
+    if [ $SRS_DEBUG_STATS = YES ]; then     SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --debug-stats=on"; else        SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --debug-stats=off"; fi
     if [[ $SRS_EXTRA_FLAGS != '' ]]; then   SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --extra-flags=\\\"$SRS_EXTRA_FLAGS\\\""; fi
     if [[ $SRS_BUILD_TAG != '' ]]; then     SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --build-tag=\\\"$SRS_BUILD_TAG\\\""; fi
     if [[ $SRS_TOOL_CC != '' ]]; then       SRS_AUTO_CONFIGURE="${SRS_AUTO_CONFIGURE} --cc=$SRS_TOOL_CC"; fi
diff --git a/trunk/src/app/srs_app_hybrid.cpp b/trunk/src/app/srs_app_hybrid.cpp
index 9f7a37343..b8645bb4f 100644
--- a/trunk/src/app/srs_app_hybrid.cpp
+++ b/trunk/src/app/srs_app_hybrid.cpp
@@ -39,6 +39,7 @@ extern SrsPps* _srs_pps_pub;
 extern SrsPps* _srs_pps_conn;
 extern SrsPps* _srs_pps_dispose;
 
+#if defined(SRS_DEBUG) && defined(SRS_DEBUG_STATS)
 extern unsigned long long _st_stat_recvfrom;
 extern unsigned long long _st_stat_recvfrom_eagain;
 extern unsigned long long _st_stat_sendto;
@@ -101,6 +102,7 @@ SrsPps* _srs_pps_sched_40ms = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_sched_80ms = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_sched_160ms = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_sched_s = new SrsPps(_srs_clock);
+#endif
 
 SrsPps* _srs_pps_clock_15ms = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_clock_20ms = new SrsPps(_srs_clock);
@@ -112,6 +114,7 @@ SrsPps* _srs_pps_clock_80ms = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_clock_160ms = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_timer_s = new SrsPps(_srs_clock);
 
+#if defined(SRS_DEBUG) && defined(SRS_DEBUG_STATS)
 extern int _st_active_count;
 extern unsigned long long _st_stat_thread_run;
 extern unsigned long long _st_stat_thread_idle;
@@ -121,6 +124,7 @@ SrsPps* _srs_pps_thread_run = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_thread_idle = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_thread_yield = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_thread_yield2 = new SrsPps(_srs_clock);
+#endif
 
 ISrsHybridServer::ISrsHybridServer()
 {
@@ -372,14 +376,17 @@ srs_error_t SrsHybridServer::notify(int event, srs_utime_t interval, srs_utime_t
     }
 
     string recvfrom_desc;
+#if defined(SRS_DEBUG) && defined(SRS_DEBUG_STATS)
     _srs_pps_recvfrom->update(_st_stat_recvfrom); _srs_pps_recvfrom_eagain->update(_st_stat_recvfrom_eagain);
     _srs_pps_sendto->update(_st_stat_sendto); _srs_pps_sendto_eagain->update(_st_stat_sendto_eagain);
     if (_srs_pps_recvfrom->r10s() || _srs_pps_recvfrom_eagain->r10s() || _srs_pps_sendto->r10s() || _srs_pps_sendto_eagain->r10s()) {
         snprintf(buf, sizeof(buf), ", udp=%d,%d,%d,%d", _srs_pps_recvfrom->r10s(), _srs_pps_recvfrom_eagain->r10s(), _srs_pps_sendto->r10s(), _srs_pps_sendto_eagain->r10s());
         recvfrom_desc = buf;
     }
+#endif
 
     string io_desc;
+#if defined(SRS_DEBUG) && defined(SRS_DEBUG_STATS)
     _srs_pps_read->update(_st_stat_read); _srs_pps_read_eagain->update(_st_stat_read_eagain);
     _srs_pps_readv->update(_st_stat_readv); _srs_pps_readv_eagain->update(_st_stat_readv_eagain);
     _srs_pps_writev->update(_st_stat_writev); _srs_pps_writev_eagain->update(_st_stat_writev_eagain);
@@ -387,8 +394,10 @@ srs_error_t SrsHybridServer::notify(int event, srs_utime_t interval, srs_utime_t
         snprintf(buf, sizeof(buf), ", io=%d,%d,%d,%d,%d,%d", _srs_pps_read->r10s(), _srs_pps_read_eagain->r10s(), _srs_pps_readv->r10s(), _srs_pps_readv_eagain->r10s(), _srs_pps_writev->r10s(), _srs_pps_writev_eagain->r10s());
         io_desc = buf;
     }
+#endif
 
     string msg_desc;
+#if defined(SRS_DEBUG) && defined(SRS_DEBUG_STATS)
     _srs_pps_recvmsg->update(_st_stat_recvmsg); _srs_pps_recvmsg_eagain->update(_st_stat_recvmsg_eagain);
     _srs_pps_sendmsg->update(_st_stat_sendmsg); _srs_pps_sendmsg_eagain->update(_st_stat_sendmsg_eagain);
     _srs_pps_sendmmsg->update(_st_stat_sendmmsg); _srs_pps_sendmmsg_eagain->update(_st_stat_sendmmsg_eagain);
@@ -396,16 +405,20 @@ srs_error_t SrsHybridServer::notify(int event, srs_utime_t interval, srs_utime_t
         snprintf(buf, sizeof(buf), ", msg=%d,%d,%d,%d,%d,%d", _srs_pps_recvmsg->r10s(), _srs_pps_recvmsg_eagain->r10s(), _srs_pps_sendmsg->r10s(), _srs_pps_sendmsg_eagain->r10s(), _srs_pps_sendmmsg->r10s(), _srs_pps_sendmmsg_eagain->r10s());
         msg_desc = buf;
     }
+#endif
 
     string epoll_desc;
+#if defined(SRS_DEBUG) && defined(SRS_DEBUG_STATS)
     _srs_pps_epoll->update(_st_stat_epoll); _srs_pps_epoll_zero->update(_st_stat_epoll_zero);
     _srs_pps_epoll_shake->update(_st_stat_epoll_shake); _srs_pps_epoll_spin->update(_st_stat_epoll_spin);
     if (_srs_pps_epoll->r10s() || _srs_pps_epoll_zero->r10s() || _srs_pps_epoll_shake->r10s() || _srs_pps_epoll_spin->r10s()) {
         snprintf(buf, sizeof(buf), ", epoll=%d,%d,%d,%d", _srs_pps_epoll->r10s(), _srs_pps_epoll_zero->r10s(), _srs_pps_epoll_shake->r10s(), _srs_pps_epoll_spin->r10s());
         epoll_desc = buf;
     }
+#endif
 
     string sched_desc;
+#if defined(SRS_DEBUG) && defined(SRS_DEBUG_STATS)
     _srs_pps_sched_160ms->update(_st_stat_sched_160ms); _srs_pps_sched_s->update(_st_stat_sched_s);
     _srs_pps_sched_15ms->update(_st_stat_sched_15ms); _srs_pps_sched_20ms->update(_st_stat_sched_20ms);
     _srs_pps_sched_25ms->update(_st_stat_sched_25ms); _srs_pps_sched_30ms->update(_st_stat_sched_30ms);
@@ -415,6 +428,7 @@ srs_error_t SrsHybridServer::notify(int event, srs_utime_t interval, srs_utime_t
         snprintf(buf, sizeof(buf), ", sched=%d,%d,%d,%d,%d,%d,%d,%d,%d", _srs_pps_sched_15ms->r10s(), _srs_pps_sched_20ms->r10s(), _srs_pps_sched_25ms->r10s(), _srs_pps_sched_30ms->r10s(), _srs_pps_sched_35ms->r10s(), _srs_pps_sched_40ms->r10s(), _srs_pps_sched_80ms->r10s(), _srs_pps_sched_160ms->r10s(), _srs_pps_sched_s->r10s());
         sched_desc = buf;
     }
+#endif
 
     string clock_desc;
     _srs_pps_clock_15ms->update(); _srs_pps_clock_20ms->update();
@@ -428,12 +442,14 @@ srs_error_t SrsHybridServer::notify(int event, srs_utime_t interval, srs_utime_t
     }
 
     string thread_desc;
+#if defined(SRS_DEBUG) && defined(SRS_DEBUG_STATS)
     _srs_pps_thread_run->update(_st_stat_thread_run); _srs_pps_thread_idle->update(_st_stat_thread_idle);
     _srs_pps_thread_yield->update(_st_stat_thread_yield); _srs_pps_thread_yield2->update(_st_stat_thread_yield2);
     if (_st_active_count > 0 || _srs_pps_thread_run->r10s() || _srs_pps_thread_idle->r10s() || _srs_pps_thread_yield->r10s() || _srs_pps_thread_yield2->r10s()) {
         snprintf(buf, sizeof(buf), ", co=%d,%d,%d, yield=%d,%d", _st_active_count, _srs_pps_thread_run->r10s(), _srs_pps_thread_idle->r10s(), _srs_pps_thread_yield->r10s(), _srs_pps_thread_yield2->r10s());
         thread_desc = buf;
     }
+#endif
 
     srs_trace("Hybrid cpu=%.2f%%,%dMB%s%s%s%s%s%s%s%s%s%s",
         u->percent * 100, memory,