Snowflake performance issues. that’s if you define a column with varchar max.

Snowflake performance issues. Providing solutions and fixes for common Snowflake ETL issues can save users significant time and effort, enabling them to optimize their data pipelines and improve overall efficiency. 14. Such queries lead to a massive join data explosion, and therefore applying LIKE () on exploded The recent release of Snowflake materialized views (MV) provides an exciting new feature that adds performance improvements to Snowflake. However, as usage grows across teams and pipelines, subtle performance degradation and data inconsistency issues can surface—particularly in environments with concurrent ELT jobs, complex materialized views, or excessive Aug 9, 2023 · I'd be extremely grateful for any insight on this issue. This leads to very different data export times between snowflake->PowerBI and snowflake->SSAS or other microsoft implementations of the snowflake ODBC driver. For example: Develop ways to improve your data pipeline based on your cost, data lag, and Sep 17, 2019 · It is near impossible at the moment to develop direct query reports on Snowflake with Power BI Desktop. The example Guides Data Engineering Dynamic Tables Performance considerations Refresh performance Workload How workload affects dynamic table performance Optimizing the workload in your pipeline helps reduce cost and improve performance in general. Learn how to optimize your queries, manage resources—and more! Guides Data Engineering Dynamic Tables Performance considerations Best practices for optimizing performance Best practices for optimizing dynamic table performance To optimize your dynamic tables’ performance, you should understand the system, experiment with ideas, and iterate based on results. Guides Performance optimization Optimizing warehouses for performance Optimizing warehouses for performance In the Snowflake architecture, virtual warehouses provide the computing power that is required to execute queries. This topic provides information for testing hybrid tables in Snowflake. In first instance, I have a materialized view created, with brings data by joining fact table and 3-4 dimension tables. Continue to help good content that is interesting, well-researched, and useful, rise to the top! Jun 27, 2025 · Users often face unexpected Snowflake cost overruns, data governance issues, and performance bottlenecks that hinder their data operations (DataOps). Visuals take ages to load, refresh is stuck on "Evaluating" and "Waiting for other queries" for tens of minutes. These operations allow you to retrieve multiple rows of Sep 2, 2022 · Instead of identifying the root causes of performance problems, following known Snowflake performance best practices, and avoiding anti-patterns, Snowflake users take shortcuts. that’s if you define a column with varchar max. While Snowflake provides strong security mechanisms, including multi-factor authentication, encryption at rest, and secure zone isolation, data governance in the cloud is still a challenge. Here are 5 key metrics for monitoring Snowflake performance. Sep 9, 2021 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. Current Snowflake Status All Systems Operational About This Site Welcome to Snowflake's home for real-time and historical data on system performance. That fear costs them $40,000+ annually in unnecessary compute charges. Jan 9, 2024 · This knowledge base article discusses the performance implications of local and remote disk spilling and how to mitigate the performance impact due to it. Tuning Snowflake workloads requires more than just adjusting warehouse sizes — it involves understanding how Snowflake stores Aug 16, 2023 · This article discusses a performance issue related to JDBC metadata API methods when schema or table contains underscore and ways to overcome the issue. May 12, 2018 · We are setting up a new SAS FAW environment that is connecting to Snowflake (ODBC) and S3 as our data sources. Mar 11, 2024 · This article outlines the optimization methods and capabilities within Snowflake to enhance performance and lower expenses. Jul 24, 2020 · The Snowflake Database has no indexes to build, no statistics to capture or partitions to manage. This article explains why the problem occurs and provides potential solutions. You can include everything from monitoring query performance to analyzing usage patterns and show you how to leverage Snowflake Jan 17, 2024 · This knowledge base article discusses a performance issue related to metadata operations in the JDBC driver, particularly when using calls such as getTables () or getSchema (). For more information, see Clouds and regions. In this post, we showcase our amazing Snowflake technology partners and their ways of using the new query function within their respective products. Opening a Snowflake table in SAS Enterprise Guide 7. Troubleshooting these issues ensures efficient data processing and cost optimization. Using Snowflake and Power BI together is becoming more and more common. Jul 31, 2024 · One of the primary challenges in optimizing Snowflake performance is balancing cost and performance. However, users often encounter issues such as query performance bottlenecks, data loading failures, authentication problems, and cost management challenges. While Snowflake abstracts much of the infrastructure, its black-box nature can make troubleshooting Developer External Functions Performance Designing high-performance external functions This topic provides information about concurrency, reliability, and scalability of external functions, including information about using asynchronous external functions. Jul 4, 2025 · What are the practical snowflake performance optimization techniques to improve speed, reduce costs, and avoid common pitfalls. May 15, 2024 · This can be monitored by using the graph in the web interface (Go to the Warehouses section of Snowflake UI and click on the Warehouse which is showing performance issues): To monitor the same information programmatically, you can use the WAREHOUSE_LOAD_HISTORY function. Jun 27, 2023 · To measure real-world performance, we needed to find a way to decouple workload changes with Snowflake system performance improvements so that we can track them separately. If you are experience slow queries or long run times, check for these common causes first. Snowflake recommends starting your optimization by tuning your workload because it’s the most impactful way to improve the performance of your dynamic table Guides Databases, Tables, & Views Table Design Table Design Considerations This topic provides best practices, general guidelines, and important considerations when designing and managing tables. At Snowflake, our product philosophy revolves around continuously enhancing the performance of our product, particularly the core database engine. Materialized views support several different use cases, including performance. However, optimizing Snowflake SQL performance becomes essential as datasets grow more extensive and queries become more complex. Scaling up resources can improve performance but at an increased cost, while under-provisioning can lead to slow query times and poor user experiences. Jul 21, 2024 · Rewritten: 15-Jun-2025 Snowflake Query Optimization Snowflake delivers exceptional performance out of the box — but that doesn’t mean every workload runs efficiently. If you’ve ever faced slow queries, ballooning credit consumption, or unpredictable performance, you’re not alone. synchronous: A call to a synchronous Snowflake LIMIT/OFFSET performance issues Asked 5 years, 6 months ago Modified 3 years, 10 months ago Viewed 4k times The issue is when client tools are reading the data . Learn how to fix slow dashboards, streamline DirectQuery, and accelerate insights with AtScale. In this post we'll cover an optimization technique practitioners can use to speed up queries involving a range join by up to 300x 1. Select column_a::varchar(16777216) from view vs Select column_a::varchar(100) from view As y Jun 25, 2025 · Snowflake's growth and AI integration, but uncover concerns over stagnant margins and growing losses. 19. Customer experience: Customers hosted in the specified regions may have been unable to access or use Snowflake services and Jun 8, 2022 · There are several features in the pipeline, both for the Snowflake connector and DirectQuery in general, that will significantly improve the performance of DirectQuery mode for Snowflake. These issues can impact data analytics efficiency and operational costs. In this … Oct 22, 2025 · Snowflake's Incident and Scheduled Maintenance HistoryCurrent status: We've monitored the environment to confirm rolling back the update has restored service. Learn about strategies to fine-tune computing power in order to improve the performance of a query or set of queries running on a warehouse, including enabling the Query Acceleration Service. Ready to take your Snowflake skills to the next level? Guides Applications and tools for connecting to Snowflake Troubleshoot Snowflake client connectivity Snowflake client connectivity and troubleshooting This topic provides an architecture overview explaining the various service endpoints required for normal client operations. Data governance is essential Jan 16, 2023 · Range joins and other types of non-equi joins are notoriously slow in most databases. In this article, I’ll walk through 20 practical tactics to improve Snowflake query performance Hi, we are trying to extract data from our Snowflake hosted warehouse using ODBC. Discover tips and best practices tailored for data engineers & analysts Aug 12, 2024 · Having worked with over 50 Snowflake customers across Europe and the Middle East, I've analyzed hundreds of Query Profiles and identified many issues including issues around performance and cost. We can see on our Snowflake console that it takes milliseconds for the query to run Take full benefit of Snowflake query profile feature and optimize your Snowflake queries! This guide will teach you the best techniques for Snowflake query optimization to get maximum results. Release notes Performance improvements Performance Improvements Snowflake is constantly introducing features that improve performance. Feb 8, 2024 · This article explains why queries that use EQUAL_NULL in the join condition are extremely slow and how to work around the issue. I'm running the latest version of Power BI Desktop (9/2019) and Snowflake ODBC driver (2. Synchronous remote services A remote service can be synchronous or asynchronous. Read more on why I'm skeptical of SNOW's premium valuation. We explore 15 best practices to optimize the performance of Snowflake and Power BI. Today, I’m sharing the critical settings that make this possible. When evaluating hybrid tables for the first time in your environment, you will Mar 18, 2022 · Currently we are using snowflake to query the database and curious if the following hinders performance. Jul 16, 2024 · Snowflake performance tuning is essential to optimize costs and get the most of your cloud investment. So ideally you would want to stick with the varchar (1) but if it’s an intermediate table not being queried by a lot of other tools, then it might not May 27, 2025 · Power BI running slow with Snowflake? Discover common performance issues, practical fixes, and how AtScale’s semantic layer can dramatically speed things up. Apr 5, 2023 · It is more than just monitoring the health of your clusters or tracking query performance. Enabling this feature introduces the following behavior changes: VARCHAR and BINARY types appear without length in the output of GET_DDL, SHOW, and DESCRIBE commands for column Dec 21, 2023 · Performance Issue with Snowflake after creating the view Asked 1 year, 10 months ago Modified 1 year, 10 months ago Viewed 891 times Guides Databases, Tables, & Views Hybrid Tables Performance testing Performance testing Feature — Generally Available Available to accounts in AWS and Microsoft Azure commercial regions only. If you experience additional issues or have questions, please open a support case via Snowflake Community. Is this an expected duration. May 28, 2025 · Anyone who’s worked with Snowflake knows how queries and improperly sized warehouses can lead to sluggish performance and ballooning resource consumption. Here are some of the most common mistakes and how to avoid them. Fine-tuning the compute resources provided by a warehouse can improve the performance of a query or set of queries. Snowflake's cloud-native data warehouse is renowned for its elasticity and scalability, but in large-scale enterprise deployments, users often encounter hard-to-diagnose performance bottlenecks, especially with complex queries, excessive warehouse scaling, or data ingestion anomalies. Snowflake stores Introducing the Snowflake Performance Index (SPI) - measuring real-world performance improvements and price for performance in Snowflake. Jul 10, 2025 · Stop Wasting Snowflake Credits: How Query Insights Uncovers Hidden Performance Issues We’ve all been there: Dashboards taking minutes to load Nightly pipelines running hours behind schedule That … Jun 12, 2024 · Discover how the Snowflake Performance Index (SPI) improved by 27%, highlighting Snowflake’s commitment to innovating on performance with the goal to reduce customer cost over time. Aug 19, 2025 · Optimize Power BI and Snowflake performance with this ultimate guide. We need results, not expensive insurance policies. Improvements that make queries run faster can reduce costs because a warehouse only consumes credits while it is running. Aug 28, 2025 · Improve Snowflake speed and efficiency with 13 expert tips, including AI query acceleration, smart clustering, materialized views, and optimized data loading. While Snowflake is blazing fast for most queries, it too suffers from poor performance when processing these types of joins. Jul 17, 2020 · The Snowflake Data Warehouse has an excellent reputation as an analytics platform for blisteringly fast query performance, but without indexes. Many of these features require no user interaction and no additional cost. Improve your Snowflake performance with these top 5 essential tips and techniques. Jan 2, 2025 · Snowflake has become a cornerstone of modern data warehousing with its ability to scale dynamically and handle massive datasets with ease. However, users often encounter challenges such as slow query performance, authentication failures, storage cost overruns, concurrency issues, and integration failures with third-party tools. Feb 13, 2025 · Even experienced data teams can run into performance issues in Snowflake if they overlook key optimization techniques. Jan 18, 2025 · Maximizing query performance in Snowflake is a blend of strategic design, efficient practices, and leveraging platform features. Jan 28, 2024 · Unlock the secrets to turbocharging your Snowflake queries with our expert guide. Here are some common best practices. Performance degrades drastically when a warehouse runs out of memory while executing a query because memory bytes must “spill Aug 11, 2025 · Such problems can severely impact data pipeline reliability, dashboard latency, and cost predictability. May 28, 2024 · Overcoming Snowflake Challenges: Securing and Governing Data Managing data security and governance in a Snowflake environment is a snowflake challenge many organizations face. I was expecting the 1 million-row result set to be retrieved in a matter of seconds. In this article, I’ll walk you through proven techniques to optimize your Snowflake implementation. The first pattern I blogged about was partition pruning. 15 takes a really long time (5-16 hours) for medium sized tables, Character variable length in Snowflake seems to be one of the reasons Jul 19, 2023 · Snowflake ETL is a complex process that often encounters issues and errors, making troubleshooting guides essential for users to identify and resolve problems efficiently. This talk wasn’t about shaving costs for the sake of finance. Jan 24, 2025 · How to Analyze Query Performance in Snowflake Have you ever wondered how you can go about optimizing your Snowflake queries for better performance and cost efficiency? It is often a challenge for … Mar 25, 2024 · Optimizing Snowflake Query for Better Performance Introduction In today’s data-driven era, organizations heavily rely on cloud platforms such as Snowflake to manage and analyze essential data … Feb 12, 2024 · In this guide, we share 16 proven optimization techniques to maximize the performance and efficiency of Snowflake. Get started now! Guides Migrations Tools SnowConvert AI General Technical Documentation Issues And Troubleshooting Performance Review General SnowConvert AI - General Performance Review Messages SSC-PRF-0001 This statement has usages of cursor fetch bulk operations Description This warning indicates that the statement uses cursor fetch bulk operations. Jul 28, 2025 · Snowflake has become a go-to cloud data platform for enterprises due to its scalability, native support for semi-structured data, and separation of storage and compute. Mar 8, 2025 · Snowflake is a cloud-based data warehousing platform designed for high-performance analytics and scalability. Nov 8, 2023 · In this first part, I focus on the performance challenges of Snowflake based on a multidimensional approach that addresses Snowflake technology, Snowflake ecosystem, and Snowflake users. Let’s review the most common challenges of Snowflake and provide actionable strategies for overcoming Snowflake challenges effectively. Learn about options for optimizing Snowflake query performance. Jul 8, 2025 · Here’s the reality – most organizations start with Medium or Large Snowflake warehouses for Oracle-to-Snowflake replication because they’re afraid of performance issues. This article explores the underlying causes of these issues, diagnostic methodologies, and proven strategies to optimize Snowflake environments for high-performance, cost-efficient analytics at scale. Apr 4, 2025 · This article discusses the most common reasons for query performance degradation. I tried running simple queries to return > 1 million rows from Snowflake using the EXECUTE AT SQL command against a linked server using the official Snowflake ODBC driver. Create View V1 as Select Col1, Guides Queries Using query insights to improve performance Using query insights to improve performance If conditions exist that affect query performance, Snowflake provides insights about these conditions. Jan 10, 2023 · Rewriting slow running queries which have explosive equi-join conditions and additional join conditions based on LIKE operator This article discusses an example scenario where LIKE () string operations on columns from two tables are degraded due to duplications of values in join condition columns. By implementing these tips and continuously monitoring your queries, you can achieve faster execution times, reduced costs, and a better overall Snowflake experience. 00). Follow these best practices to make queries run faster while reducing costs. Whether you’re migrating from a legacy system or Area: Ingestion Sub-Area: Performance Issue Snowflake ingestion takes an extremely long time to complete, times out, or consumes excessive resources. This commonly occurs with large Snowflake de Deferred Merge (for high-churn tables) Some DML patterns cause poor DML performance in the data pipeline that, in some cases, can result in extremely high data latency and other performance problems. Feb 3, 2023 · Please note that remediation of these issues requires the engagement of teams responsible for managing the client network and/or network security as Snowflake personnel does not have the authority to make changes outside its own managed networks. yes performance and storage is not an issue for snowflake. Nov 19, 2024 · This page lists the known issues in Azure Data factory. It also provides a solution to mitigate this issue. I searched for similar issues in the past and tried all the suggested I have two different instances of Snowflake. I said it because too many teams try to fix performance issues by throwing more compute at the problem, without understanding what their workloads are actually doing inside the warehouse. As said below by u/TianStokes , using the CData implementation of the snowflake ODBC driver is indeed an option to improve performance. Jan 19, 2025 · Snowflake Dynamic Table Performance Considerations Thank you for reading my latest article. This blog will help you to explore the world of Snowflake observability and give you the tools and techniques needed to gain complete visibility into your Snowflake environment. Here at Medium, I regularly write about data architecture, Business Architectures Business Concepts, and … Aug 21, 2023 · External function incorrectly scans all rows ignoring the filter conditions which leads to performance issues This article addresses a current constraint in external functions where all rows are scanned, disregarding filter conditions. Jul 25, 2023 · So, let’s get started! Snowflake Query Profile The Snowflake Query Profile is a comprehensive breakdown of the execution steps and performance statistics for a specific query. . In this blog, we’ll cover seven essential query optimization techniques to enhance query performance and achieve Guides Performance optimization Optimizing warehouses for performance Resolving memory spillage Queries too large to fit in memory This topic discusses how a warehouse owner or administrator can resolve memory spillage in order to improve the performance of a query. Jan 16, 2024 · How to diagnose a slow running query This knowledge base article provides guidance in identifying the reason for the performance degradation of a query. How do you tune Snowflake for maximum performance? Apr 19, 2025 · In today’s blog, let’s dive into something that every Snowflake user — beginner or expert — eventually faces: query performance issues. In this blog post, I’ll focus on using materialized views to solve a specific performance problem that arises when a large data set has multiple access paths. It will start by looking at best practices, tips and tricks Jun 27, 2023 · At Snowflake Summit, we announced the public launch of the Snowflake Performance Index (“SPI”), an aggregate index for measuring real-world improvements in Snowflake performance experienced by customers over time. Oct 28, 2022 · This blog explores the different types of Streams and how to optimize performance when using them in the Snowflake Data Cloud. What's reputation and how do I get it? Instead, you can save this post to reference later. Aug 21, 2024 · Having worked with over 50 Snowflake customers across Europe and the Middle East, I've analyzed hundreds of Query Profiles and identified many issues including issues around performance and cost. This article explores practical ways to improve query performance in Snowflake. In reality, many environments fall short due to poor query design, inefficient data structures, and avoidable bottlenecks. In general in Snowflake the data type length won’t cause a difference in performance when querying from Snowflake with Snowflake. Dec 7, 2023 · The Snowflake Partner Network unlocks the potential of the Data Cloud with a broad array of tools and partners. Join our community of data professionals to learn, connect, share and innovate together Snowflake is a cloud-based data platform known for its scalability, simplicity, and high performance. We prioritize delivering Sep 16, 2021 · In this iteration of the Snowflake for Tableau series, we will discuss how to optimize performance when connecting Snowflake to Tableau. Mar 21, 2022 · When it comes to Snowflake performance issues, you may have decided that the occasional slow query is just something that you have to live with, right? Or maybe not. Jul 23, 2024 · While I spend my day job digging into an amazing variety of performance issues, there are some patterns we see over and over again. However, you can implicitly observe the new increased length by creating or reading objects of a larger size, but not storing them. Asynchronous vs. Date/Time Data Types for Columns When defining columns to contain dates or timestamps, Snowflake recommends choosing a date or timestamp data type rather than a character data type. The new size limit isn’t explicitly exposed in SQL query output or metadata. This can result in performance issues. However, the flexibility and power of Snowflake come with the responsibility of optimizing queries to ensure performance and cost-efficiency. it takes about 30-40 seconds to extract 1m rows (of about 60 fields) into our analysis platform using the latest SnowFlake ODBC driver Apr 2024. Snowflake Performance issues when querying large tables Asked 5 years, 11 months ago Modified 5 years, 6 months ago Viewed 5k times May 14, 2022 · Snowflake’s cloud-native architecture makes it incredibly easy to get started — but running it efficiently at scale is a whole different game. Improve your Snowflake queries' performance and efficiency with these proven Snowflake query optimization best practices. Before submitting an Azure support request, review this list to see if the issue that you're experiencing is already known and being addressed. Jul 23, 2021 · The intent of this blog is to cover different areas of performance tuning when Power BI’s running slow using Snowflake as data source. Our certified partnerships and integrations enable customers to leverage Snowflake Oct 24, 2024 · Before you can optimize your data cloud, you first need to monitor it. Jul 23, 2019 · This article takes a look at how following best practices allow Snowflake to analyze and present data without sacrificing on performance. So, how can you tune the Snowflake database to Discover how Snowflake enhances performance and reduces costs through hardware optimizations, intelligent resource allocation and automatic performance improvements. Jul 22, 2025 · That’s how I opened my talk at the Snowflake User Group Meetup in New York this past March. Upvoting indicates when questions and answers are useful. Mar 17, 2025 · Snowflake is a cloud-based data warehousing platform known for its scalability, performance, and ease of use. That being said there are issues I’ve seen with some BI tools like PowerBI being able to query huge columns. fc rmhuh fk0c uyrcsb scwr gv isejtwp egj9 tkpxaz yoqpe