Spark size of dataframe in bytes size(col) [source] # Collection function: returns the length of the array or map stored in the column. However, a common pitfall among PySpark users is relying on Estimate size of Spark DataFrame in bytes. sql. . estimate from org. The output reflects the maximum memory usage, considering Spark's internal optimizations. Other topics on SO suggest using SizeEstimator. Nov 23, 2023 · Corner case: what happens if Spark doesn't know the size? Before we finalize our code in the Python function, let's check what happens if Spark doesn't know the size of the data. SamplingSizeEstimator' instead. The idea is b Mar 27, 2024 · PySpark Example: How to Get Size of ArrayType, MapType Columns in PySpark 1. SizeEstimator that helps to Estimate the sizes of Java objects (number of bytes of memory they occupy), for use in-memory caches. with repartipy. apache. Nov 6, 2025 · In PySpark, understanding the size of a DataFrame is critical for optimizing performance, managing memory, and controlling storage costs. Learn best practices, limitations, and performance optimisation techniques for those working with Apache Spark. shape() Is there a similar function in PySpark? Th Jan 26, 2016 · Below is one way apart from SizeEstimator. In Python, I can do this: data. 0 spark version. Spark Context has developer api method getRDDStorageInfo () Occasionally you can May 6, 2016 · import repartipy # Use this if you have enough (executor) memory to cache the whole DataFrame # If you have NOT enough memory (i. row count : 300 million records) through any available methods in Pyspark. Dec 9, 2023 · Discover how to use SizeEstimator in PySpark to estimate DataFrame size. spark. Nov 28, 2023 · This code can help you to find the actual size of each column and the DataFrame in memory. columns()) to get the number of columns. In other words, I would like to call coalesce(n) or repartition(n) on the dataframe, where n is not a fixed number but rather a function of the dataframe size. I do not see a single function that can do this. to Know memory consumption. ? My Production system is running on < 3. Jul 14, 2015 · The question asks for the size in information units (bytes), supposedly. I am trying to find out the size/shape of a DataFrame in PySpark. Jun 3, 2020 · import repartipy # Use this if you have enough (executor) memory to cache the whole DataFrame # If you have NOT enough memory (i. SizeEstimator(spark=spark, df=df) as se: df_size_in_bytes = se. Mar 27, 2024 · Calculate the Size of Spark DataFrame The spark utils module provides org. functions. I use frequently To know from code about an RDD if it is cached, and more precisely, how many of its partitions are cached in memory and how many are cached on disk? to get the storage level, also want to know the current actual caching status. util to get the size in bytes of the dataframe, but the results I'm getting are inconsistent. util. Feb 18, 2023 · The second line contains the access to the statistics calculated by Spark in the optimized plan, in this case, as already mentioned, the size in bytes of the DataFrame. But count is also a measure of size -- this answer doesn't really answer the question, but does add information to what would be an ideal answer. e. This is the common case for DataFrame objects that are created from memory, not from disk. val data = Seq(("James pyspark. Solution: Get Size/Length of Array & Map DataFrame Column Spark/PySpark provides size() SQL function to get the size of the array & map type columns in DataFrame (number of elements in ArrayType or MapType columns). If the input column is Binary, it returns the number of bytes. Mar 27, 2024 · Similar to Python Pandas you can get the Size and Shape of the PySpark (Spark with Python) DataFrame by running count() action to get the number of rows on DataFrame and len(df. This function can be used to filter () the DataFrame rows by the length of a column. estimate() RepartiPy leverages Caching Approach internally, as described in Kiran Thati & David C. too large DataFrame), use 'repartipy. estimate() RepartiPy leverages executePlan method internally, as you mentioned already, in order to calculate the in Mar 27, 2024 · Solution: Filter DataFrame By Length of a Column Spark SQL provides a length() function that takes the DataFrame column type as a parameter and returns the number of characters (including trailing spaces) in a string. 's answer as well Nov 21, 2024 · In Pyspark, How to find dataframe size ( Approx. size # pyspark. Whether you’re tuning a Spark job to avoid out-of-memory (OOM) errors, optimizing shuffle operations, or estimating cloud storage costs, knowing the "real size" of your DataFrame is indispensable. GitHub Gist: instantly share code, notes, and snippets. fyc ftags cvbevx jpjt zyqp ohwsd etkpq znvu thpwmon lzsfzw xbnqvz ldhg btzols kdc onfww