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PORavenDB long response time for query, while was processed on server very fast
 

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  1. PORavenDB long response time for query, while was processed on server very fast
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    <p>Raven.Server started and binded to port 8022. I initialize DataStore in the following way:</p> <pre><code> var store = new DocumentStore() { Url = "http://localhost:8022" }; store.Initialize(); </code></pre> <p>Then i'm making such query:</p> <pre><code> using (var session = store.OpenSession()) { Stopwatch watch = new Stopwatch(); watch.Start(); var result = session.LuceneQuery&lt;Item&gt;("Raven/DocumentsByEntityName") .WhereEquals("Tag", "Items") .ToList(); watch.Stop(); // watch.ElapsedMilliseconds == ~550 ms return result; } </code></pre> <p>And <code>watch.ElapsedMilliseconds</code> is always ~550 ms. But when i look to RavenDB console i see that query was processed in 3 ms:</p> <pre><code>Request # 170: GET - 3 ms - 200 - /indexes/Raven/DocumentsByEntityName?query=Tag%253A%255B%255BItems%255D%255D&amp;start=0&amp;pageSize=128 </code></pre> <p>Thus ~ 99.5% of time have been spent not in RavenDB. What is the problem? (RavenDB 147)</p> <p><strong>When i switch to self-hosting of RavenDB (i.e. as embedded client) everything is okay (~3ms).</strong></p> <p>To clarify that issue not in network, http debuggers, dns servers etc. i also tested this:</p> <pre><code> Stopwatch watch = new Stopwatch(); watch.Start(); WebClient client = new WebClient(); var result = client.DownloadString("http://127.0.0.1:8022/indexes/Raven/DocumentsByEntityName?query=Tag%253A%255B%255BItems%255D%255D&amp;start=0&amp;pageSize=128"); watch.Stop(); // watch.ElapsedMilliseconds == ~3-10ms </code></pre> <p>Fast. But switching to Raven.Client.Lightweight increase response time in 200 times (550-600 ms)</p>
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    1. USDmitry Schetnikovich
    1. USDmitry Schetnikovich
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      1. VTUpMod
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    1. COWhile this doesn't answer your question this is a somewhat flawed test as you're only doing a single comparison, you want to wrap a loop around your using statement and move the stop watch to just inside the loop then print out the time or store it in a list or something then you can see if the first request(s) are outliers and you'll have more data to look at afterwards.
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      1. USChris Marisic
    2. CO@Chris, i'm not interesting in building (and furthermore in showing to community) comprehensive performance test. It's enough for me that it works as expected when used as embedded client.
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      1. USDmitry Schetnikovich
    3. COAre you seeing the same consistent times in a loop? Becuase without testing your code in a tight loop you can't really be sure if you the optimization needs to take place in the code itself or the startup procedure.
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