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Linq to SQL Random Timeouts on Simple Small Queries


Linq to SQL Random Timeouts on Simple Small Queries

By : user2172931
Date : October 22 2020, 08:10 AM
I wish this help you After some sessions of hair-pulling and deep thought, I figured out the solution to my problem. I'm answering my own question just in case anyone else comes across this issue, they won't have to go through what I went through.
I noticed that setting a break point on the Save method made the issue more likely:
code :
[TestMethod]
public void AllMethodProperlyReturnsAllInstances()
{
    // Arrange
    Model.PopulateDatabaseConnection(GlobalTestData.TestingDirectory);
    List<Universe> universes = new List<Universe>();
    universes.Add(new Universe() { Name = "Test1" });
    universes.Add(new Universe() { Name = "Test2" });
    universes.Add(new Universe() { Name = "Test3" });

    // Act
    universes.ForEach(x => x.Save()); // <-- Break Point Here
    List<Universe> returnUniverses = Universe.All();

    // Assert
    foreach (Universe universe in universes)
    {
        if (!returnUniverses.Any(x => x.ID == universe.ID)) { Assert.Fail(); }
    }
}


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Using NHibernate.Linq and getting 2 queries for a simple select, why?

Using NHibernate.Linq and getting 2 queries for a simple select, why?


By : user2195029
Date : March 29 2020, 07:55 AM
should help you out clientReports will probably execute the query every time you enumerate it (or get the Count(), for example).
To avoid that, use .ToList() in the assignment.
Random SQL Server Timeouts during a small window of time at random times

Random SQL Server Timeouts during a small window of time at random times


By : zhangqingqing
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Use PerfMon to analyze disk bottleneck. Then memory pressure. And then issues on the network.
Random simple queries are failing on BigQuery

Random simple queries are failing on BigQuery


By : Olivier
Date : March 29 2020, 07:55 AM
should help you out Sorry for the slow response.
BigQuery replicates data to multiple datacenters and may run queries from any of them. Usually this is transparent ... if your data hasn't replicated everywhere, we will try to find a datacenter that has all of the data necessary to run a query and execute the query from there.
Random numbers in linq queries

Random numbers in linq queries


By : user3676741
Date : March 29 2020, 07:55 AM
hope this fix your issue
Is it true that random data inside a lazy statement might get evaluated differently at runtime?
code :
if (!q1.SequenceEqual(q2))
    Console.WriteLine("wow!");
20000: the xs sequence, used only once by the foreach cycle:
20000 * 2 * 5000: 20000 cycles in which the ys sequence is used twice
var xs = (from x in Enumerable.Range(0, 20000)
         select generator.Next()).ToArray();

var ys = (from y in Enumerable.Range(0, 5000)
         select generator.Next()).ToArray();
SQL 2005 random connection timeouts / best practice regarding db timeouts

SQL 2005 random connection timeouts / best practice regarding db timeouts


By : user3779256
Date : March 29 2020, 07:55 AM
around this issue Handle exception so they don't crash your system Fix your database calls so they don't time out
Both of the issues above must be implemented. A database call can always throw exceptions, no matter what precautions you take, so you must handle exception, period.
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