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Buffered inserts and deadlocks
Recently I was debugging a very interesting deadlock case which I want to share in a blog post now. It was especially curious because, as...
Feb 22
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Filtering on FlowFields
It has been said so many times that filtering on FlowFields is bad for performance that we are used to avoiding this kind of filters in...
Feb 6
722 views
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Table indexes and inserts
Following my series of posts where I have been addressing various aspects of table indexing, this post delves into the same old argument...
Dec 21, 2024
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Another alternative to SIFT: Columnstore indexes
According to this article on Microsoft Learn portal , non-clustered columnstore indexes (or NCCI) are seen as a possible replacement for...
Nov 10, 2024
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Hidden SQL queries in AL you (probably) want to avoid
Development of Business Central extensions is very much about the database communication, and as AL developers, we always control the...
Oct 28, 2024
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if not IsEmpty then FindSet... again
Yes, I'm back again on this inexhaustible topic. The question of weather the call of IsEmpty before FindSet in AL can have a positive...
Oct 22, 2024
474 views
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Covering indexes as an alternative to SIFT
In two of my previous blog posts I reviewed some pros and cons of the SumIndexField Technology (or SIFT) in Business Central. On the one...
Oct 20, 2024
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if not IsEmpty then FindSet... Or not?
This post is a result of one very fruitful discussion with many knowledgeable Business Central enthusiasts in a long LinkedIn thread. Now...
Aug 25, 2024
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The dark side of SumIndexFields. Concurrency.
My previous post was dedicated to an overview of Business Central's SumIndexField Technology, or simply SIFT, which helps us collect...
Aug 9, 2024
505 views
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SIFT
SIFT, which stands for Sum Index Flow Technology, used to be a know-how in the Navision database, a data structure that stored...
Aug 5, 2024
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Navision legacy in AL: RecordLevelLocking
RecordLevelLocking function in AL is a heritage of the C/SIDE times and the Navision native database. In those old days when Navision...
Jun 30, 2024
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Select with partially matching index: can we make it faster?
Let's assume we want to select a set of customer ledger entries based on two values: salesperson code and the payment reference. Or any...
Jun 20, 2024
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Lock timeouts and deadlocks
A long time ago (in a galaxy far away) I published some blog posts with a deeper overview of the Business Central's ReadIsolation...
Jun 9, 2024
1,183 views
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Read Committed Snapshot isolation and the Write Skew anomaly
Much has been said recently about the benefits of the Azure SQL for Business Central performance, and in particular a few articles...
Nov 26, 2023
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if not IsEmpty() then DeleteAll()
My previous post on good and bad coding practices in terms of the performance touched upon one particularly contradictory coding pattern...
Nov 14, 2023
1,188 views
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Top 5 AL mistakes that undermine performance
This post is my shortlist of the most common beginners' mistakes in AL that affect application performance. These are not necessarily the...
Nov 10, 2023
2,459 views
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When partial records and indexes reach synergy
Continuing performance testing of queries on extended Business Central tables, today I want to look at the same dataset from a slightly...
Jul 13, 2023
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Who benefits from partial records: The true magic of SetLoadFields
Server-side perspective One of the key characteristics of the C/AL language and its more modern ancestor, AL, that makes it so attractive...
Jul 6, 2023
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Locking Scope: Differences between LockTable and ReadIsolation
Today, once again, I am returning to the topic of table locking, lock escalation, and the way Business Central interacts with SQL Server...
Jul 1, 2023
1,894 views
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Introduction to Business Central Caching - Part 2
The effects of SetLoadFields and AutoCalcFields on caching This post continues the topic of query caching in Business Central which I...
Jun 29, 2023
828 views
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