aokolnychyi commented on a change in pull request #2921:
URL: https://github.com/apache/iceberg/pull/2921#discussion_r707684723



##########
File path: 
spark3/src/main/java/org/apache/iceberg/spark/procedures/ExpireSnapshotsProcedure.java
##########
@@ -90,7 +96,14 @@ public StructType outputType() {
       if (retainLastNum != null) {
         action.retainLast(retainLastNum);
       }
-
+      if (numThreads != null && numThreads > 0) {
+        action.executeDeleteWith(Executors.newFixedThreadPool(numThreads, 
runnable -> {

Review comment:
       I'd probably move the initialization of a thread pool into a separate 
method that would accept a size.
   Something similar to what @RussellSpitzer did in 
`BaseRewriteDataFilesSparkAction`.




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