Entity framework first query takes long time

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WebFeb 15, 2015 · Entity Framework async operation takes ten times as long to complete. I’ve got an MVC site that’s using Entity Framework 6 to handle the database, and I’ve been … WebHowever, I profiled the performance and Entity Framework is too slow. (My app processes 2 messages in about 1.2 seconds, where the (legacy) app that I am re-writing does 5-6 messages in the same time. (The legacy app calls sprocs for its DB Access.) My profiling points to Entity Framework taking the bulk of the time per message.

EF query is excecuted too slow only on first time

WebNov 22, 2015 · 6. Your filtered variable contains a query which is a question, and it doesn't contain the answer. If you request the answer by calling .ToList (), that is when the query is executed. And that is the reason why it is slow, because only when you call .ToList () is the query executed by your database. It is called Deferred execution. WebMay 15, 2024 · Typically the effect is that your first query - and it doesn't matter which one - is slow and subsequent queries are fast. It must not necessarily be a query that could be slow. If the first operation you are doing with EF in your application is an Insert that would be slow. Or even an Attach that doesn't touch the database at all would be slow ... multiplicity mathematics wikipedia

sql server - Why does this query take so long in Entity Framework…

WebMar 19, 2015 · I am having an issues with the EF that the first query takes a long time. I thought the query itself was taking a long time. So, I used . context.Database.Log = s => System.Diagnostics.Debug.WriteLine(s); to see what query is being sent. It only took only 1 ms but from the open connection to close connection, it took 18 second. WebMay 8, 2024 · 2. Serialization is not the big deal, it's easy to notice now that you have added the LINQ query that the issue is the poor SQL Entity Framework will generate from it. First of all, you should be using eager loading to join your products table with the parts table. You can do that simply by adding an Include method call. WebDec 16, 2015 · Because there’s a long-running query, we’ll want to take a look at the execution plan to understand why that query ran slowly. We can see that the most expensive operation is the Table Scan. This means that SQL Server is having to look at every row in the table, and it’s typical to see that take a long time. multiplicity kvm download

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entity framework - Why is the process of obtaining …

WebCategory Query Learning for Human-Object Interaction Classification Chi Xie · Fangao Zeng · Yue Hu · Shuang Liang · Yichen Wei A Unified Pyramid Recurrent Network for Video Frame Interpolation Xin Jin · LONG WU · Jie Chen · Chen Youxin · Jay Koo · Cheul-hee Hahm SINE: Semantic-driven Image-based NeRF Editing with Prior-guided Editing Field WebApr 17, 2013 · I use Entity Framework 4.5 with Object Context. My model has around 200 entities type. The first time I make a ridiculous query in a 10 records database that returns 1 record, it will take 3 seconds. From then on, not only this query, but all will become instant. If I close IISExpress and open it again. The first time will be very slow again. how to mine cryptocurrency on gaming pcWebSep 8, 2016 · Apparently connecting to the SQL server is taking the most of the time. 15 seconds for the first time is a lot of time to accept, I have never seen such a delay in any application. the object graph is small its only 12 tables with very few records, even no records for some tables, for example, workflow table contains only 2 records. the ... how to mine cryptocurrency on pc 2021

"WebFeb 25, 2024 · Entity Framework loads very slowly the first time because the first query EF compiles the model. If you are using EF 6.2, you can use a Model Cache which loads a prebuilt edmx when using code first; instead, EF generates it on startup. public class MyDbConfiguration : DbConfiguration { public MyDbConfiguration () : base () { var path = … " - Entity framework first query takes long time

Entity framework first query takes long time

Entity Framework is taking 3 seconds to execute the simplest query …

WebApr 29, 2015 · If I run the following query in SQL Server Management Studio, it takes about 1-2 seconds to complete... select * from GeographicalLocations where Active=1 If I do the equivalent in LinqPad, it takes about 2-3 seconds... GeographicalLocations.Where (gl => gl.Active) However, the same code in a repository that uses EF4 takes about 10-11 …

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WebDec 3, 2012 · Now, I have roughly 50k Items and only 100 ItemGroups. If I execute a context.Items.ToList (), using SQL Profiler, the duration is around 2-3 seconds which is completely acceptable. If, however, I want to load the ItemGroups at the same time using context.Items.Include ("ItemGroup").ToList (), the execution time jumps up to around 12 … WebSep 18, 2024 · 1. In the end, it's a SQL query. Run it in the debugger, with a breakpoint at the call to ToListAsync. Take a look at query and its generated SQL in the debugger. Do a sanity check on the SQL. Copy it over to SSMS and see if it takes a long time to run. Then do the normal thing you'd do to try to optimize a query (take a look at the query plan ...

WebJan 11, 2016 · To counter this Cartesian explosion, Entity Framework core 5 introduced the concept of split queries that enables loading related data in multiple queries. It prevents building one massive, multiplied SQL result set. Also, because of lower query complexity, it may reduce the time it takes to fetch data even with multiple roundtrips. WebJan 22, 2016 · Test results are as follows: EF6 result：. User table, the time required for the first query: 1453 millisecond. User table, the time required for the second query: 16 millisecond. Role table, the time required for the first query: 832 millisecond. User table, the time required for the third query: 26 millisecond.

WebOct 14, 2024 · Sorted by: 1. First start is slow because EF configuring table mappings. Most important thing that you can do is to redesign you dbcontext. You must split configurations into different contexts. One context must contains few entities, associated in meaning (as is done in DDD). E.g. WebCategory Query Learning for Human-Object Interaction Classification Chi Xie · Fangao Zeng · Yue Hu · Shuang Liang · Yichen Wei A Unified Pyramid Recurrent Network for …

WebJan 16, 2024 · It's hard to know why it takes 500ms because they might have several reasons. (dbContext as IObjectContextAdapter).ObjectContext. Doing it mean the OnModelCreating method will be invoked, and the model will be compiled for the first time. Some query will be executed on the database as well.

WebFeb 25, 2024 · Entity Framework loads very slowly the first time because the first query EF compiles the model. If you are using EF 6.2, you can use a Model Cache which loads … multiplicity math meaningWebAug 7, 2015 · Second step: Exclude as much as possible. Indexes (No, the query is fast) Returning too much data (No, according to the info you have) Slow query compilation (No, raw sql query is used) Slow data transfer (No, the other queries works well) Slow DbContext initialization (No, you said it's not the first query) multiplicity math definitionWebOct 7, 2024 · 5) I am using migrations (code first) The first request will take about 20 second to execute and sometime will timeout. But all subsequent requests will take about 2-3 seconds to return results. I am doing a search with "contain" as part of the condition. So I realize that will add some inefficiency to the query. multiplicity kvm proWebFeb 7, 2024 · I would like to ask. We have a "problem" that causes that first query after project startup takes long to handle. First time query is handled takes several seconds let's say 2-8 seconds (depending on … multiplicity kvm modeWebOct 8, 2010 · Regarding the Entity Framework, the first time you run a query it must be compiled into SQL. You can use the CompiledQuery type to pre-compile Entity Framework queries in order to do this work ahead of time, before the end user has to wait for it. On … how to mine cryptocurrency on a laptopWebMay 31, 2024 · Handling Entity Framework Core migrations: creating a migration – Part 1; ... Relational fixup, different from normal query. The first step will have filled in the primary keys and foreign keys, which define how the data is connected to each other. ... (Identity Resolution can take a long time). This is why you end up with four Authors ... multiplicity mathematicsWebMar 9, 2024 · If a certain query is taking too much time (e.g. because an index is missing), this can be seen discovered by inspecting command execution logs and observing how long they actually take. EF makes it very easy to capture command execution times, via either simple logging or Microsoft.Extensions.Logging: multiplicity kvm pro fr