I run some load tests using JMeter to understand how my application works under load on the Google App Engine (Java).
When I hit about 100 virtual users, the response time begins, and I notice "throttle_code = 4" appearing in the GAE log files (see below).
Does anyone know what that means? Is the fact that I am making multiple requests from the same IP address using some kind of automatic DDOS protection?
thank
---- request with "throttle_code = 4"; when connecting from JMeter
07-05 05:11 AM 58.917 / market / 1234 / history? Pricebars = 240 200 3651ms 19cpu_ms 35kb Java / 1.5.0_16, gzip (gfe)
75.101.226.4 - - [05 / Jul / 2010: 05: 12: 02 -0700] "GET / market / 1234 / history? Pricebars = 240 HTTP / 1.1" 200 35566 - "Java / 1.5.0_16, gzip (gfe) "" ci-pricehistory.appspot.com "ms = 3652 cpu_ms = 19 api_cpu_ms = 0 cpm_usd = 0.004527 pending_ms = 3570 throttle_code = 4
I 07-05 05:12 AM 02.532
uk.co.cityindex.CandleServlet fetch: Loading 240 bars from cache ...
I 07-05 05:12 AM 02.558
uk.co.cityindex.CandleServlet fetch: time: 47
---- request without "throttle" log; when connecting from browser
07-05 06:28 AM 10.993 / market / 1234 / history? Pricebars = 240 200 69ms 19cpu_ms 7kb Mozilla / 5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit / 533.4 (KHTML, like Gecko) Chrome / 5.0. 375.99 Safari / 533.4, gzip (gfe)
80.169.172.178 - - [05 / Jul / 2010: 06: 28: 11 -0700] "GET / market / 1234 / history? Pricebars = 240 HTTP / 1.1" 200 7572 - "Mozilla / 5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit / 533.4 (KHTML, like Gecko) Chrome / 5.0.375.99 Safari / 533.4, gzip (gfe) "" ci-pricehistory.appspot.com "ms = 69 cpu_ms = 19 api_cpu_ms = 0 cpm_usd = 0.001423
I 07-05 06:28 AM 11.031
uk.co.cityindex.CandleServlet fetch: Loading 240 bars from cache ...
I 07-05 06:28 AM 11.055
uk.co.cityindex.CandleServlet fetch: time: 45
source
share