doGet() servlet 中的一个非常简单的 java 代码在 GAE 上占用了超过一秒的 cpu 时间。我已经阅读了一些与配额相关的文档,显然我没有做错任何事。
//Request the user Agent info
String userAgent = req.getHeader("User-Agent");
我想知道什么使用 CPU 最多,我使用了 google 帮助推荐。
//The two lines below will get the CPU before requesting User-Agent Information
QuotaService qs = QuotaServiceFactory.getQuotaService();
long start = qs.getCpuTimeInMegaCycles();
//Request the user Agent info
String userAgent = req.getHeader("User-Agent");
//The three lines below will get the CPU after requesting User-Agent Information
// and informed it to the application log.
long end = qs.getCpuTimeInMegaCycles();
double cpuSeconds = qs.convertMegacyclesToCpuSeconds(end - start);
log.warning("CPU Seconds on geting User Agent: " + cpuSeconds);
上面的代码告诉我的唯一一件事是检查 header 将使用超过一秒(1000 毫秒)的 CPU 时间,这对 Google 来说是日志面板上的警告。这似乎是一个非常简单的请求,但仍在使用超过一秒的 CPU。
我错过了什么?
为了大家的利益,我发布了完整的代码。
@SuppressWarnings("serial")
public class R2CComingSoonSiteServlet extends HttpServlet {
private static final Logger log = Logger.getLogger(R2CComingSoonSiteServlet.class.getName());
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
//The two lines below will get the CPU before requesting User-Agent Information
QuotaService qs = QuotaServiceFactory.getQuotaService();
long start = qs.getCpuTimeInMegaCycles();
//Request the user Agent info
String userAgent = req.getHeader("User-Agent");
//The three lines below will get the CPU after requesting User-Agent Information
// and informed it to the application log.
long end = qs.getCpuTimeInMegaCycles();
double cpuSeconds = qs.convertMegacyclesToCpuSeconds(end - start);
log.warning("CPU Seconds on geting User Agent: " + cpuSeconds);
userAgent = userAgent.toLowerCase();
if(userAgent.contains("iphone"))
resp.sendRedirect("/mobIndex.html");
else
resp.sendRedirect("/index.html");} }
最佳答案
App Engine 上不再有任何每分钟配额。任何提及它们的消息都已过时。如果你想更好地分析你的 CPU 使用率,你可能想试试新发布的 appstats for Java .
关于java - 如何在不超过分钟配额的情况下在 Google App Engine 上使用 Java?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/2535607/