[英]error occurs when using asycio loop in tornado under high concurrency
我在tornado
項目中安裝了asyncio
Ioloop
,它的單個請求運行沒有問題,但是當我進行服務器壓力測試時:
ab -n 10000 -c 4000 -p '/home/mwh/ad_tornado/for_test/task.json' -T 'application/x-www-form-urlencoded' '192.168.1.170/hwSdk/tsk/get_t_k.json'
發生錯誤:
[E 161216 10:32:22 base_events:1090] Exception in callback BaseAsyncIOLoop._handle_events(11, 1)
handle: <Handle BaseAsyncIOLoop._handle_events(11, 1)>
Traceback (most recent call last):
File "/usr/local/lib/python3.4/asyncio/events.py", line 125, in _run
File "/home/mwh/virtualenv_mwh/lib/python3.4/site-packages/tornado/platform/asyncio.py", line 114, in _handle_events
File "/home/mwh/virtualenv_mwh/lib/python3.4/site-packages/tornado/stack_context.py", line 275, in null_wrapper
File "/home/mwh/virtualenv_mwh/lib/python3.4/site-packages/tornado/netutil.py", line 260, in accept_handler
File "/usr/local/lib/python3.4/socket.py", line 187, in accept
OSError: [Errno 24] Too many open files
在龍卷風中使用asynico ioloop是否會降低性能?
您正在嘗試運行4000
並行請求,這意味着同時打開4000
套接字。
但是通常系統限制默認情況下僅允許打開1024個文件(嘗試ulimit -a
)。
您可以通過ulimit -n 4096
調用來覆蓋該限制。
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