diff --git a/plugins/webstats/lua/webstats_common.lua b/plugins/webstats/lua/webstats_common.lua
index ef031e15a..1a2b26db6 100644
--- a/plugins/webstats/lua/webstats_common.lua
+++ b/plugins/webstats/lua/webstats_common.lua
@@ -95,7 +95,7 @@ function _M.cron(self)
             end
         end
 
-        local tmp_log = "{$SERVER_APP}/logs/tmp.log"
+        local tmp_log = "{$SERVER_APP}/logs/tmp_"+ngx.now()+".log"
         -- 空闲空间小于10M,立即存盘
         -- local capacity_bytes = ngx.shared.mw_total:free_space()
         -- self:D("capacity_bytes:"..capacity_bytes)