jmeter - 使用终极线程组时JMeter频率峰值
问题描述
我在 JMeter 中使用 Ultimate Thread Group 进行性能测试。结合计时器,我想动态扩展用户/线程的数量,同时每个用户都有一个恒定的吞吐量,例如 10 个请求/秒。
当 Ultimate Thread Group 增加用户数时,每秒总请求率会在短时间内出现高峰。高峰过后,请求率符合预期。
例如,我得到以下跟踪:Start with 40 users, 10 requests per second for each user: 40 * 10 = 400 requests/second。将用户数增加到 60 个,我预计60 * 10 = 600 个请求/秒,但一开始我的峰值超过3959 个请求/秒。
summary = 366401 in 00:15:16 = 400.0/s Avg: 1 Min: 0 Max: 1071 Err: 0 (0.00%)
summary + 12000 in 00:00:30 = 400.0/s Avg: 1 Min: 0 Max: 20 Err: 0 (0.00%) Active: 40 Started: 40 Finished: 0
summary = 378401 in 00:15:46 = 400.0/s Avg: 1 Min: 0 Max: 1071 Err: 0 (0.00%)
summary + 12000 in 00:00:30 = 400.0/s Avg: 1 Min: 0 Max: 44 Err: 0 (0.00%) Active: 40 Started: 40 Finished: 0
summary = 390401 in 00:16:16 = 400.0/s Avg: 1 Min: 0 Max: 1071 Err: 0 (0.00%)
summary + 31784 in 00:00:30 = 1061.9/s Avg: 4 Min: 0 Max: 414 Err: 0 (0.00%) Active: 60 Started: 60 Finished: 0
summary = 422185 in 00:16:46 = 419.7/s Avg: 1 Min: 0 Max: 1071 Err: 0 (0.00%)
summary + 118770 in 00:00:30 = 3959.0/s Avg: 5 Min: 0 Max: 493 Err: 0 (0.00%) Active: 60 Started: 60 Finished: 0
summary = 540955 in 00:17:16 = 522.2/s Avg: 2 Min: 0 Max: 1071 Err: 0 (0.00%)
summary + 79419 in 00:00:30 = 2647.3/s Avg: 10 Min: 0 Max: 1435 Err: 0 (0.00%) Active: 60 Started: 60 Finished: 0
summary = 620374 in 00:17:46 = 582.0/s Avg: 3 Min: 0 Max: 1435 Err: 0 (0.00%)
summary + 37227 in 00:00:30 = 1238.1/s Avg: 6 Min: 0 Max: 1354 Err: 0 (0.00%) Active: 60 Started: 60 Finished: 0
summary = 657601 in 00:18:16 = 600.0/s Avg: 3 Min: 0 Max: 1435 Err: 0 (0.00%)
summary + 18000 in 00:00:30 = 600.3/s Avg: 2 Min: 0 Max: 219 Err: 0 (0.00%) Active: 60 Started: 60 Finished: 0
summary = 675601 in 00:18:46 = 600.0/s Avg: 3 Min: 0 Max: 1435 Err: 0 (0.00%)
summary + 18000 in 00:00:30 = 599.9/s Avg: 1 Min: 0 Max: 46 Err: 0 (0.00%) Active: 60 Started: 60 Finished: 0
有没有办法避免这个高峰?(如果我将用户数量从 60 增加到 80.80 到 100,我也会达到这个峰值,...)
解决方案
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