Hi all, I wrote some 60 million records to a S3 and created Delta table on top of it. Initially, i could see all files are created of 128mb size When i run Merge on day 2 which has updates and inserts, all files merged to single file of size 786mb. If i run OPTIMIZE tableName ZORDER BY columnName, i could see files are created back with 128MB, These are some of Spark configs i use ("spark.databricks.delta.retentionDurationCheck.enabled", "false"), ("spark.databricks.delta.autoOptimize.optimizeWrite", "true"), ("spark.databricks.delta.autoOptimize.autoCompact", "auto"), ("spark.databricks.delta.autoCompact.maxFileSize", 134217728), ("spark.databricks.delta.optimize.maxFileSize", 134217728), ("spark.databricks.delta.tuneFileSizesForRewrites", "false"), I am unable to find what's kicking off this file merge to single file. Can you please give me an idea.