SQL Server 2017 Express is faster than Standard Edition

What could explain that the SQL Server Express Edition is much faster than the Web / Standard Edition?

These are multiple VMs where hosting is possible. They all have the same problem. Some are the same problem on SQL Server 2012 others on 2017. All machines have the latest updates.

The machine is good enough for the job 8G 4 cores and the DBs are small and have a data volume of less than 1 GB. Same machines. I even tried running Express and Mi-Edition on the same computer with only one instance enabled and the same problem.

It does not matter if the web application runs locally on the same computer or remotely accesses the SQL server over the network.

The DBs have exactly the same data.

The number of requests in forms and their complexity is about half as high as in the web edition. This is a repeatable problem that does not occur only once.

It is not specific to the Web Edition and server type because it was replicated to development computers in Express VS Developer Edition.

The SQL Server settings seem to be identical.

Several people have looked at it and we can not figure out why.

I was told to give an example:

                Select Top (500) *
by UserLog u
Join the staff at s.Username = u.username
Join Forms f on f.PageFile = u.PageFile
left outer join client c to c.CID = u.CID
order by u.id desc

Execution plan are exactly the same.

Over several attempts, Express is 50% faster for this very simple query.

Is there a minimum DB size for the non-Express edition? (that would not make sense …)

Error reading cors XML in Visual Studio 2017 with Javascript

I'm trying to read an XML file from Visual Studio 2017 in Chrome, and I miss that bug:

Accessing XMLHttpRequest at & # 39; c: // xxxxxxxxxxxxxx & # 39; from the origin # http: // localhost: xxxxx & # 39; was blocked by the CORS directive.

The code that starts it is the following:

if (window.XMLHttpRequest) {
xmlhttp = new XMLHttpRequest ();
} else {
xmlhttp = new ActiveXObject ("Microsoft.XMLHTTP");
}
xmlhttp.open ("GET", "C: / xxxxxxxxxxx", false);
xmlhttp.setRequestHeader ("Access-Control-Allow-Origin", "http: // localhost: xxxxx");
xmlhttp.setRequestHeader (& # 39; Content-Type & # 39 ;, & # 39; application / xml & # 39;);
xmlhttp.send ();
xmlDoc = xmlhttp.responseXML;

I would appreciate help, I'm stuck for a while.
I tried to use the Allow-Allow-Allow-Origin Chrome extension: * and skip the error anyway.

SQL Server 2017 – Slows down read-only activities on synchronous secondary replicas primary replicas in the availability group?

Suppose we have an availability group configuration (SQL Server 2017) in which primary and synchronous secondary resources are not shared
(Each replica has a dedicated CPU, dedicated memory, dedicated hard drive, etc.)

Do read-only activities on synchronous secondary systems affect the performance of the primary replica?

The reason why I ask because different sources tell different (contradictory) things:

Some sources say this has implications and it is not recommended to outsource read-only activities to synchronize secondary activity
(It is recommended to relocate only to asynchronous replicas.) Others recommend that the report load be relocated to secondary, even if it is in sync

What do you think about it? Is there a simple answer "yes" or "no"?

c ++ – To configure a usable kit for Qt after reinstalling Visual Studio 2017

I reinstalled Visual Studio 2017 and could not configure a working kit for Qt.

At the beginning, I had both Qt5.9.8 MSVC2017_64bit and Visual Studio 2017 installed on my computer. They just worked well. Then I upgraded Visual Studio to 2019 and uninstalled VS2017. Then my Qt Creator collapsed. When I try to open a previously created Qt project, only the message "No valid kits found" appears.

I tried to reinstall something "necessary" and restore something to make Qt work. So I opened Visual Studio Installer, checked to install the latest v141 tools from Visual Studio Enterprise 2017 single component "VC ++ 2017 Version 15.9 v14.16". Then I opened Qt Creator 4.8.2, Menu-> Tools-> Kits, manually added a clang-cl C and C ++ compiler, and set the compiler path to "C: Program Files (x86) Microsoft Visual." Studio 2017 VC Tools MSVC 14.16.27023 bin Hostx64 x64 cl.exe "fixed." I also tried some combinations of Hostx64, Hostx86, and x64, x86 when selecting the path, but none of they had success.

I also heard and tested Qt VS Tools.

Related Environments:

Microsoft Visual Studio 2019 Enterprise

Microsoft Visual Studio 2008 Professional (whose compiler was automatically detected in Qt but is not usable)

Qt 5.9.8 MSVC2017_64bit

Would someone tell me what I can do to solve this problematic problem? Thanks (and sorry for my bad language)!

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Memory – Windows Server 2019 allows Allocation Unit Size up to 2 MB … how does this affect SQL Server 2017?

Starting with Windows Server 2019can now be formatted with one Size of allocation units up to 2 MB; In previous versions, the maximum was 64 KB. All documentation and BKMs for SQL Server 2017 Suggest that you format the 64 MB drives, but most of these documents are outdated. So my question is: is 64 MB the recommended (maximum) size, or can we start developing larger units up to the new maximum size of 2 MB?

SQL Server 2017 – Is the column memory index really so important to the success of partitioned records?

I've just read most of a partitioning article written by Kendra Little a few years ago. She felt that column storage indexes and partitioning would make a great partnership. It seemed to imply that the pds partnership would be very important in indexing column stores. I do not know if she's changed her mind since then.

But I missed the meaning. can someone explain why? I think I understand the pros and cons of each and we have not been so impressed with column memory indexes yet, especially when adding column-based predicate conditions (3rd, 4th, etc.).

Does it say that adding a column storage index (clustered or unclustered) between partitions compression and elimination would mean switching your gas to premium under the right conditions (real volume, etc.)?

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ThomasLound
Reviewed by ThomasLound on
,
i 2019 huz
i209 hd uzhttps: //i106.fastpic*****big/2019/0626/d5/1c6ed4b0f500ddd19f6826437ebe2ed5.jpg i i i 5-, Xiaomi – (iLenta). 22:57 Foton -2019 () (). 220, 88 30 ..2019 – .2019,:, & # 39 ;. 02:20. (2019). 2.24. – (2019). 02.15.56. . -. , -. .7. 201922: 30. 2. i 2Home Abbaia agli altri cani i K 20 2019 .5. 2017 "" – HD Youtube.46. , 20. 2019, 20 2019
Rating: 5

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me 2019 #lyt

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ThomasLound
Reviewed by ThomasLound on
,
me 2019 #lyt
i 2019 #lyt https: //i109.fastpic*****big/2019/0524/84/852cc9e300f0cf5ce1b0facb66c2c384.jpg iii 35 (429) 29 2013 ,, (, (II). (,, 73-., , ,,!,? 1980-, 10. 2019 ,,,,,, 11 2019 11:00, 14:00 1988 .21. 2012 () 39,9951,89 38,6366,25 26,9562,95 32 , 5040,00 .INEMA UA – ,, I'm Number Four (2011) HD Paul Extended Cut (2011) HD, .IMDb: (69 524)
Rating: 5

,