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Revolutionizing Magento Performance: The Untapped Potential of Removing the DISTINCT Operator

Revolutionizing Magento Performance: The Untapped Potential of Removing the DISTINCT Operator

"Revolutionizing Magento Performance: The Untapped Potential of Removing the DISTINCT Operator"

The persistent performance issue in Magento, particularly in its 2.4.6 Commerce version, lays bare a systemic flaw in the platform's handling of search queries, exacerbating CPU loads and slowing down keyword search times. This issue, deeply rooted in the use of the 'DISTINCT' operator within the search query, presents an untapped opportunity for optimization. In this article, "Revolutionizing Magento Performance: The Untapped Potential of Removing the DISTINCT Operator", we will explore how a simple adjustment to the search_query structure can result in significant improvement in performance, promising a swift, effectual solution to this prevalent problem.

The Achilles Heel of Magento Performance: CPU Load and the 'DISTINCT' Operator

The crux of Magento's performance issue is an overburdened CPU, a consequence of its handling of search queries, particularly those involving the search_query table. This table, on the verge of a hernia with an expansive 1.4 million rows, is the linchpin of keyword search. However, it is also the unwitting cause of significant strain on the CPU.

The main culprit is a query, SELECT DISTINCT COUNT(*) FROM search_query, necessary for the caching of popular search terms but a major drain on resources. The DISTINCT operator used in this query has been found to be both unnecessary and a significant impediment to query performance. The operator's role is to return unique rows in the result set. However, in the context of Magento's search_query table (especially when it has grown to gargantuan proportions), the DISTINCT operator is a computational glutton.

Dissecting the Search Query: The Root of the Inefficiency

The inefficiency of the search query is rooted in the num_results > 0 condition. This condition seems innocuous, but it's a silent efficiency killer that significantly extends query duration. This issue persists even with the implementation of ElasticSearch or disabling search suggestions, indicating that the problem is intrinsic to Magento's current search_query structure.

To put the issue into perspective, consider a search_query table overflowing with data. The DISTINCT operator, combined with the num_results > 0 condition, has to sift through this massive table, row by row, to return unique results. This quest for uniqueness is an enormous burden on the CPU, slowing query execution and, by extension, keyword search performance.

The performance issue is not an isolated incident confined to older versions of Magento. It has been reproduced on the latest 2.4-develop branch, and it remains a pressing concern in the Magento 2.4.6 Commerce version. It is a systemic flaw begging for a resolution.

Beyond the 'DISTINCT' Operator: Potential Solutions for Optimization

The answer to Magento's performance conundrum may surprisingly lie within its own structure – the removal of the DISTINCT operator from queries within Magento's Query Collection. This solution, although simple, has shown promising results. Removing the DISTINCT operator significantly reduces the CPU load, improving query duration and, consequently, keyword search performance.

Potential solutions also involve streamlining the search_query table. One such method is asynchronous insertion of search terms into the table in batches. Another option is to insert a fraction of search terms or to cease tracking search terms altogether. These methods would control the size of the search_query table, reducing the strain on the database and speeding up queries.

In a world that demands instantaneous results, waiting 10 seconds for a keyword search to complete is an eternity. By merely removing the DISTINCT operator, the search duration can be shortened to just 2-3 seconds.

While these potential solutions are yet to be officially developed and implemented, they showcase the untapped potential within Magento's current structure. We stand on the precipice of a significant stride forward in enhancing Magento's performance, unlocking a new era of efficiency and speed.

Revamping Keyword Search: The Power of Adjusting the isTopSearchResult Function

The keyword search function plays a crucial role in Magento’s operational efficiency, but its current handling by the system leaves much to be desired. The function’s time-consuming performance, taking an untenable 10 seconds on average to complete, is largely due to the unwieldy search_query table, which can rapidly grow to contain millions of entries.

A key way to improve the situation lies in adjusting the isTopSearchResult function in Collection.php. By implementing this change, the time spent on keyword searches can be significantly reduced, potentially slashing the current 10-second duration to a far more palatable 2-3 seconds.

The DISTINCT operator is frequently implicated in the keyword search function's slow performance. This operator, while serving a purpose, has proven to be somewhat of a luxury that the search_query structure can ill afford. Removing the DISTINCT operator from the query has been shown to improve performance markedly, without altering the query results.

Implications and Applications: Streamlining Magento for Improved Query Performance

The implications of these findings are far-reaching, with the potential to revolutionize Magento's overall performance. Notably, the high CPU usage observed in Magento 2.4.4-p1, attributed to the SELECT DISTINCT COUNT(*) FROM search_query query, could be significantly ameliorated by removing the DISTINCT operator.

The size of the search_query table is another aspect seriously impacting performance. Holding up to 1.4 million rows, this table is a slow moving behemoth, causing query execution to crawl. By removing the DISTINCT operator, query performance can see a significant boost, even with such a large table.

Yet, the solution isn’t as simple as merely removing the DISTINCT operator. Thoughtful application and combination of strategies are necessary. Asynchronous insertion of search terms into the table in batches, or only inserting a fraction of the search terms can also be part of the solution mix. In more extreme cases, stopping tracking search terms altogether may prove beneficial.

The Future of Magento: Reproducing the Issue and Exploring Fixes

The issue has been reproduced on the latest 2.4-develop branch of Magento, and is confirmed ready for development. This echoes the urgency of addressing the issue, particularly as it persists in Magento 2.4.4-p2 and even the 2.4.6 Commerce version.

Developers have started exploring fixes, and the consensus is leaning towards the removal of the DISTINCT operator from queries within Magento's Query Collection. The c90edaa commit, previously considered a possible solution, has now been disregarded as a fix for the performance issue.

The future of Magento hinges heavily on how this performance issue is addressed. By significantly improving query performance, the solutions pointed out in this article pave the way for a more robust, swift and efficient Magento experience. Through strategic application of these solutions, the industry can look forward to a Magento platform that no longer suffers from slow query execution and high CPU usage, marking a new chapter in its journey of technological evolution.

In conclusion, the profound impact of the DISTINCT operator on Magento's performance cannot be overlooked due to its significant strain on CPU resources and the detrimental effects on keyword search performance. By eliminating this operator from Magento's Query Collection, we stand on the brink of a revolution that stands to significantly enhance Magento's overall performance, cutting search duration from an onerous 10 seconds to a mere 2-3 seconds. Furthermore, strategies such as asynchronous insertion of search terms and limiting the size of the search_query table can further bolster performance:

  • Streamlining the search_query table through asynchronous batch insertion of search terms and limiting the number of terms tracked
  • Reducing the load on the CPU by removing the DISTINCT operator from queries within Magento's Query Collection
  • Addressing the issues inherent in the current search_query structure to rectify this systemic flaw

Thus, the future of Magento promises a more robust, swift, and efficient platform, free from slow query execution and high CPU usage. A new era beckons in the world of Magento, as we look forward to the implementation of these innovative solutions in the latest Magento versions, bringing to life the untapped potential of enhanced performance and speed. The revolution is nigh, and it brings with it the promise of a faster, more efficient Magento experience.