On 27/01/2012 22:51, bxqdev wrote: > > > On 1/28/2012 2:39 AM, Pid wrote: >> On 27/01/2012 21:35, bxqdev wrote: >>> >>> >>> On 1/28/2012 1:16 AM, Pid wrote: >>>> On 27/01/2012 21:06, bxqdev wrote: >>>>> >>>>> >>>>> On 1/27/2012 8:27 PM, Pid wrote: >>>>>> On 27/01/2012 14:53, bxqdev wrote: >>>>>>> Hello, Developers! >>>>>>> >>>>>>> 1. What are the premises to use either >>>>>>> apache.coyote.http11.Http11NioProtocol or >>>>>>> org.apache.coyote.http11.Http11NioProtocol connectors? >>>>>> >>>>>> Eh? Is that what you really mean? >>>>> >>>>> i mean what are the reasons to use either connector variant. >>>> >>>> NIO can handle more concurrent connections. >>> >>> yeah, that's why i use the nio connector. >>> >>>> >>>>>>> 2. Do i get any advantages if i use Sync Servlet Api with >>>>>>> Http11NioProtocol connector or do i have to use Async Servlet Api >>>>>>> to get >>>>>>> the advantages? >>>>>> >>>>>> What advantages are you looking for? How much traffic are you >>>>>> expecting >>>>>> to handle? >>>>> >>>>> a lot of. i'm looking for advantages in throughput and performance, >>>>> for >>>>> example. >>>> >>>> How much is a lot? >>> >>> 10'000/sec >>> >>>> How many Tomcats are you running? >>> >>> 1 >>> >>>> How much RAM/CPU per server etc? >>> >>> 8GB/Xeon >> >> Only 1 CPU? > > yes, but it's multicore. > >> >>>> How big is the average response? >>> >>> 300Kb >> >> So you want to send 300k * 10000 / sec? Isn't that just under 3Gb per >> second? > > actually when i measured it was less than 1Gb/sec
I see. Did you identify where the bottleneck was? >>>>>>> 3. How do i choose which one to use in any particular case? >>>>>> >>>>>> First, don't prematurely optimise. Have you tested your application >>>>>> yet? >>>>> >>>>> yes, i need a better throughput and performance. >>>> >>>> Please provide details. >>>> >>>> How have you optimised your application so far, or are you hoping to >>>> optimise Tomcat first? >>> >>> webapp is optimized, i want to optimize tomcat. >> >> How did you optimise your webapp for 3Gb/sec with only 8Gb of RAM? > > i wrote nice code. it's serving 1Gb/sec with 8Gb of RAM. are you surprised? No, I'm curious*. Of course you mean < 8Gb for the JVM process, as the OS etc consumes ~1.5Gb usually, you want to leave a bit of space too, so usually end up aiming for 4Gb for the JVM unless you want to use swap as well. Are you using swap to improve your memory performance? >> In 3 seconds you'll have produced more data than you have RAM, how have >> you optimised the garbage collector for this? > > we use a custom garbage collector. Interesting. Of your own design? I was going to ask whether you had a 64bit JVM and whether you found CompressedOops to be a performance improvement or not? p * There's a few meanings to that, André, I know which one I meant. > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > -- [key:62590808]
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