diff --git a/src/sf_binlog_writer.c b/src/sf_binlog_writer.c
index 16b066d..b9c0324 100644
--- a/src/sf_binlog_writer.c
+++ b/src/sf_binlog_writer.c
@@ -256,9 +256,6 @@ static inline void binlog_writer_set_next_version(SFBinlogWriterInfo *writer,
         const uint64_t next_version)
 {
     writer->version_ctx.next = next_version;
-    writer->version_ctx.ring.start = writer->version_ctx.ring.end =
-        writer->version_ctx.ring.entries + next_version %
-        writer->version_ctx.ring.size;
 }
 
 static inline int deal_binlog_one_record(SFBinlogWriterBuffer *wb)
@@ -295,83 +292,36 @@ static inline int deal_binlog_one_record(SFBinlogWriterBuffer *wb)
     return 0;
 }
 
-static void repush_to_queue(SFBinlogWriterThread *thread, SFBinlogWriterBuffer *wb)
-{
-    SFBinlogWriterBuffer *previous;
-    SFBinlogWriterBuffer *current;
+#define GET_WBUFFER_VERSION_COUNT(wb)  \
+        (((wb)->version.last - (wb)->version.first) + 1)
 
-    PTHREAD_MUTEX_LOCK(&thread->queue.lc_pair.lock);
-    if (thread->queue.head == NULL) {
-        wb->next = NULL;
-        thread->queue.head = thread->queue.tail = wb;
-    } else if (wb->version.first <= ((SFBinlogWriterBuffer *)
-                thread->queue.head)->version.first)
-    {
-        wb->next = thread->queue.head;
-        thread->queue.head = wb;
-    } else if (wb->version.first > ((SFBinlogWriterBuffer *)
-                thread->queue.tail)->version.last)
-    {
-        wb->next = NULL;
-        ((SFBinlogWriterBuffer *)thread->queue.tail)->next = wb;
-        thread->queue.tail = wb;
-    } else {
-        previous = thread->queue.head;
-        current = ((SFBinlogWriterBuffer *)thread->queue.head)->next;
-        while (current != NULL && wb->version.first > current->version.last) {
-            previous = current;
-            current = current->next;
-        }
-
-        wb->next = previous->next;
-        previous->next = wb;
-    }
-    PTHREAD_MUTEX_UNLOCK(&thread->queue.lc_pair.lock);
-}
-
-#define DEAL_CURRENT_VERSION_WBUFFER(writer, wb, version_count) \
+#define DEAL_CURRENT_VERSION_WBUFFER(writer, wb) \
     do {  \
         if ((result=deal_binlog_one_record(wb)) != 0) {  \
             return result;  \
         } \
-        fast_mblock_free_object(&writer->thread->mblock, wb);  \
-        writer->version_ctx.next += version_count;  \
+        writer->version_ctx.next += GET_WBUFFER_VERSION_COUNT(wb); \
+        fast_mblock_free_object(&writer->thread->mblock, wb);   \
     } while (0)
 
-#define GET_WBUFFER_VERSION_COUNT(wb)  \
-        (((wb)->version.last - (wb)->version.first) + 1)
-
 static int deal_record_by_version(SFBinlogWriterBuffer *wb)
 {
     SFBinlogWriterInfo *writer;
-    SFBinlogWriterBuffer **current;
-    int64_t distance;
-    int version_count;
+    SFBinlogWriterBuffer *current;
+    SFBinlogWriterBuffer *previous;
+    SFBinlogWriterSlot *slot;
     int result;
-    int next_index;
-    bool expand;
 
     writer = wb->writer;
-    distance = (int64_t)wb->version.first - (int64_t)writer->version_ctx.next;
-    if (distance >= (writer->version_ctx.ring.size - 1)) {
-        logWarning("file: "__FILE__", line: %d, subdir_name: %s, "
-                "current version: %"PRId64" is too large which "
-                "exceeds %"PRId64" + %d", __LINE__,
-                writer->cfg.subdir_name, wb->version.first,
-                writer->version_ctx.next,
-                writer->version_ctx.ring.size - 1);
-        repush_to_queue(writer->thread, wb);
-        fc_sleep_ms(10);
-        return EAGAIN;
-    } else if (distance < 0) {
+    if (wb->version.first < writer->version_ctx.next) {
         logError("file: "__FILE__", line: %d, subdir_name: %s, "
                 "current version: %"PRId64" is too small which "
-                "less than %"PRId64", tag: %d, buffer(%d): %.*s", __LINE__,
-                writer->cfg.subdir_name, wb->version.first,
+                "less than %"PRId64", tag: %"PRId64", buffer(%d): %.*s",
+                __LINE__, writer->cfg.subdir_name, wb->version.first,
                 writer->version_ctx.next, wb->tag, wb->bf.length,
                 wb->bf.length, wb->bf.buff);
         fast_mblock_free_object(&writer->thread->mblock, wb);
-        return EINVAL;
+        return 0;
     }
 
     /*
@@ -380,81 +330,57 @@ static int deal_record_by_version(SFBinlogWriterBuffer *wb)
             writer->version_ctx.next, writer);
             */
 
-    current = writer->version_ctx.ring.entries + wb->version.first %
-        writer->version_ctx.ring.size;
-    if (current == writer->version_ctx.ring.start) {
-        version_count = GET_WBUFFER_VERSION_COUNT(wb);
-        DEAL_CURRENT_VERSION_WBUFFER(writer, wb, version_count);
 
-        next_index = (writer->version_ctx.ring.start -
-                writer->version_ctx.ring.entries) + version_count;
-        if (writer->version_ctx.ring.start == writer->version_ctx.ring.end) {
-            writer->version_ctx.ring.start = writer->version_ctx.ring.end =
-                writer->version_ctx.ring.entries + next_index %
-                writer->version_ctx.ring.size;
-            return 0;
-        }
+    if (wb->version.first == writer->version_ctx.next) {
+        DEAL_CURRENT_VERSION_WBUFFER(writer, wb);
 
-        writer->version_ctx.ring.start = writer->version_ctx.ring.entries +
-            next_index % writer->version_ctx.ring.size;
-        while (writer->version_ctx.ring.start != writer->version_ctx.ring.end &&
-                *(writer->version_ctx.ring.start) != NULL)
+        slot = writer->version_ctx.ring.slots +
+            writer->version_ctx.next % writer->version_ctx.ring.size;
+        while (slot->head.next != NULL && slot->head.next->
+                version.first == writer->version_ctx.next)
         {
-            current = writer->version_ctx.ring.start;
-            version_count = GET_WBUFFER_VERSION_COUNT(*current);
-            DEAL_CURRENT_VERSION_WBUFFER(writer, *current, version_count);
-            *current = NULL;
+            current = slot->head.next;
+            slot->head.next = current->next;
 
-            next_index += version_count;
-            writer->version_ctx.ring.start = writer->version_ctx.ring.entries +
-                next_index % writer->version_ctx.ring.size;
-            writer->version_ctx.ring.count--;
+            DEAL_CURRENT_VERSION_WBUFFER(writer, current);
+            writer->version_ctx.ring.waiting_count--;
+
+            slot = writer->version_ctx.ring.slots + writer->
+                version_ctx.next % writer->version_ctx.ring.size;
         }
 
         return 0;
     }
 
-    version_count = GET_WBUFFER_VERSION_COUNT(wb);
-    distance = (int64_t)wb->version.last - (int64_t)writer->version_ctx.next;
-    if (distance >= (writer->version_ctx.ring.size - 1)) {
-        logWarning("file: "__FILE__", line: %d, subdir_name: %s, "
-                "current version: %"PRId64" is too large which "
-                "exceeds %"PRId64" + %d", __LINE__,
-                writer->cfg.subdir_name, wb->version.last,
-                writer->version_ctx.next,
-                writer->version_ctx.ring.size - 1);
-        repush_to_queue(writer->thread, wb);
-        fc_sleep_ms(10);
-        return EAGAIN;
-    }
-
-    *current = wb;
-    writer->version_ctx.ring.count++;
-    if (writer->version_ctx.ring.count > writer->version_ctx.ring.max_count) {
-        writer->version_ctx.ring.max_count = writer->version_ctx.ring.count;
-        logDebug("%s max ring.count ==== %d", writer->cfg.subdir_name,
-                writer->version_ctx.ring.count);
-    }
-
-    if (writer->version_ctx.ring.start == writer->version_ctx.ring.end) { //empty
-        expand = true;
-    } else if (writer->version_ctx.ring.end > writer->version_ctx.ring.start) {
-        SFBinlogWriterBuffer **last;
-        last = writer->version_ctx.ring.entries + wb->version.last %
-            writer->version_ctx.ring.size;
-        expand = !(current > writer->version_ctx.ring.start &&
-                last < writer->version_ctx.ring.end);
+    slot = writer->version_ctx.ring.slots + wb->version.first %
+        writer->version_ctx.ring.size;
+    if (slot->head.next == NULL) {
+        wb->next = NULL;
+        slot->head.next = wb;
+    } else if (wb->version.first < slot->head.next->version.first) {
+        wb->next = slot->head.next;
+        slot->head.next = wb;
     } else {
-        expand = (current >= writer->version_ctx.ring.end &&
-                current < writer->version_ctx.ring.start);
+        previous = slot->head.next;
+        while (previous->next != NULL && wb->version.first >
+                previous->next->version.first)
+        {
+            previous = previous->next;
+        }
+
+        wb->next = previous->next;
+        previous->next = wb;
     }
 
-    if (expand) {
-        writer->version_ctx.ring.end = writer->version_ctx.ring.entries +
-            (wb->version.last + 1) % writer->version_ctx.ring.size;
+    writer->version_ctx.ring.waiting_count++;
+    if (writer->version_ctx.ring.waiting_count >
+            writer->version_ctx.ring.max_waitings)
+    {
+        writer->version_ctx.ring.max_waitings =
+            writer->version_ctx.ring.waiting_count;
     }
 
-    return EAGAIN;
+    return 0;
 }
 
 static inline void add_to_flush_writer_queue(SFBinlogWriterThread *thread,
@@ -507,9 +433,7 @@ static int deal_binlog_records(SFBinlogWriterThread *thread,
             wbuffer = wbuffer->next;
 
             if (current->type == SF_BINLOG_BUFFER_TYPE_SET_NEXT_VERSION) {
-                if (current->writer->version_ctx.ring.start !=
-                        current->writer->version_ctx.ring.end)
-                {
+                if (current->writer->version_ctx.ring.waiting_count != 0) {
                     logWarning("file: "__FILE__", line: %d, "
                             "subdir_name: %s, ring not empty, "
                             "maybe some mistake happen", __LINE__,
@@ -526,15 +450,17 @@ static int deal_binlog_records(SFBinlogWriterThread *thread,
                 fast_mblock_free_object(&current->writer->
                         thread->mblock, current);
             } else {
+                current->writer->total_count++;
                 if ((result=deal_record_by_version(current)) == 0) {
                     add_to_flush_writer_queue(thread, current->writer);
-                } else if (!(result == EAGAIN || result == EINVAL)) {
+                } else {
                     return result;
                 }
             }
         } while (wbuffer != NULL);
     } else {
         do {
+            wbuffer->writer->total_count++;
             if ((result=deal_binlog_one_record(wbuffer)) != 0) {
                 return result;
             }
@@ -639,6 +565,7 @@ int sf_binlog_writer_init_normal(SFBinlogWriterInfo *writer,
     bool create;
     char filepath[PATH_MAX];
 
+    writer->total_count = 0;
     writer->flush.in_queue = false;
     if ((result=sf_binlog_buffer_init(&writer->binlog_buffer,
                     buffer_size)) != 0)
@@ -681,18 +608,15 @@ int sf_binlog_writer_init_by_version(SFBinlogWriterInfo *writer,
 {
     int bytes;
 
-    logDebug("init writer %s ===== next version: %"PRId64", writer: %p",
-            subdir_name, next_version, writer);
-
-    bytes = sizeof(SFBinlogWriterBuffer *) * ring_size;
-    writer->version_ctx.ring.entries = (SFBinlogWriterBuffer **)fc_malloc(bytes);
-    if (writer->version_ctx.ring.entries == NULL) {
+    bytes = sizeof(SFBinlogWriterSlot) * ring_size;
+    writer->version_ctx.ring.slots = (SFBinlogWriterSlot *)fc_malloc(bytes);
+    if (writer->version_ctx.ring.slots == NULL) {
         return ENOMEM;
     }
-    memset(writer->version_ctx.ring.entries, 0, bytes);
+    memset(writer->version_ctx.ring.slots, 0, bytes);
     writer->version_ctx.ring.size = ring_size;
-    writer->version_ctx.ring.count = 0;
-    writer->version_ctx.ring.max_count = 0;
+    writer->version_ctx.ring.waiting_count = 0;
+    writer->version_ctx.ring.max_waitings = 0;
 
     binlog_writer_set_next_version(writer, next_version);
     return sf_binlog_writer_init_normal(writer, subdir_name, buffer_size);
diff --git a/src/sf_binlog_writer.h b/src/sf_binlog_writer.h
index 0293960..a38d635 100644
--- a/src/sf_binlog_writer.h
+++ b/src/sf_binlog_writer.h
@@ -46,18 +46,20 @@ struct sf_binlog_writer_info;
 typedef struct sf_binlog_writer_buffer {
     SFVersionRange version;
     BufferInfo bf;
-    int tag;
+    int64_t tag;
     int type;    //for versioned writer
     struct sf_binlog_writer_info *writer;
     struct sf_binlog_writer_buffer *next;
 } SFBinlogWriterBuffer;
 
+typedef struct sf_binlog_writer_slot {
+    SFBinlogWriterBuffer head;
+} SFBinlogWriterSlot;
+
 typedef struct sf_binlog_writer_buffer_ring {
-    SFBinlogWriterBuffer **entries;
-    SFBinlogWriterBuffer **start; //for consumer
-    SFBinlogWriterBuffer **end;   //for producer
-    int count;
-    int max_count;
+    SFBinlogWriterSlot *slots;
+    int waiting_count;
+    int max_waitings;
     int size;
 } SFBinlogWriterBufferRing;
 
@@ -91,6 +93,7 @@ typedef struct sf_binlog_writer_info {
         char *name;
     } file;
 
+    int64_t total_count;
     struct {
         SFBinlogWriterBufferRing ring;
         int64_t next;