# Wowza Server is temporarily down when I turn off and turn on Wowza Load test Tool **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [September 9, 2014, 11:23pm UTC](https://community.wowza.com/t/wowza-server-is-temporarily-down-when-i-turn-off-and-turn-on-wowza-load-test-tool/40953 "2014-09-09T23:23:33Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Manh\_Hung\_Nguyen](https://avatars.discourse-cdn.com/v4/letter/m/c4cdca/32.png) [@Manh\_Hung\_Nguyen](https://community.wowza.com/u/Manh_Hung_Nguyen)\ **Post date:** [September 9, 2014, 11:23pm UTC](https://community.wowza.com/t/wowza-server-is-temporarily-down-when-i-turn-off-and-turn-on-wowza-load-test-tool/40953/1 "2014-09-09T23:23:33Z")
Hi everyone, I use Wowza Load Test Tool to check my Wowza Engine Server. For more details, I I create 200 .mp4 video files, bitrate of each video file is 2,6 Mbps, and configure VoD caching with 200 GB SSD Storage. I install Wowza Load Test tool on 3 servers. I configure on each Test server workerCount is 400 and fileCount is 200. When I start Load test Tool on 3 Test Servers, the Wowza Engine Server still works and I can play other VoD files by VLC or on [https://www.wowza.com/testplayers](https://www.wowza.com/testplayers). The numbers of connections is 1200, and the network is about 3 Gbps. However, when I turn off the Load test Tool on one Test server and then turn on it. The Wowza Engine Server still works a few minutes and is down. It cannot serve new connections. The Wowza Engine server doesn’t response any chunklist when I request by …/playlist.m3u8 link on a web browser. I must turn off the Load test tool on all Test servers, and then the Wowza Engine Server returns to work normally. What problem happens with my Wowza Engine Server? May the problem occur when my Wowza Engine Servers serve a lot of real clients ? Thank you. ---
**Author:** ![Matt\_Young](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/matt_young/32/389_2.png) [@Matt\_Young](https://community.wowza.com/u/Matt_Young)\ **Post date:** [September 10, 2014, 7:16pm UTC](https://community.wowza.com/t/wowza-server-is-temporarily-down-when-i-turn-off-and-turn-on-wowza-load-test-tool/40953/2 "2014-09-10T19:16:03Z")
What do you see in the logs during the time it becomes unresponsive? ---
**Author:** ![Manh\_Hung\_Nguyen](https://avatars.discourse-cdn.com/v4/letter/m/c4cdca/32.png) [@Manh\_Hung\_Nguyen](https://community.wowza.com/u/Manh_Hung_Nguyen)\ **Post date:** [September 10, 2014, 5:51pm UTC](https://community.wowza.com/t/wowza-server-is-temporarily-down-when-i-turn-off-and-turn-on-wowza-load-test-tool/40953/3 "2014-09-10T17:51:33Z")
Hi matt\_y, When I request by a new url for test, I don’t see the access log file show comment like ICT create stream INFO 200 cache/vod/phim/phimbo/phimbonuocngoai/hanhdong/vuotnguc4/vuotnguc4HD-21/0\_wjp28gce.smil When the server works normally, the above comment show when I request for the test VoD. Thank you. ---
**Author:** ![Manh\_Hung\_Nguyen](https://avatars.discourse-cdn.com/v4/letter/m/c4cdca/32.png) [@Manh\_Hung\_Nguyen](https://community.wowza.com/u/Manh_Hung_Nguyen)\ **Post date:** [September 12, 2014, 1:17am UTC](https://community.wowza.com/t/wowza-server-is-temporarily-down-when-i-turn-off-and-turn-on-wowza-load-test-tool/40953/4 "2014-09-12T01:17:32Z")
Dear matt\_y, I notice that when the server is down the iowait is very high. I use sar command to check it. %iowait about 60%, sum of %user and %system about 40%, so %idle is 0%. May it cause Wowza service is down ? Thank you.