chore: tweak CI execution memory params

.github/workflows/spark_sql_test_reusable.yml

@@ -169,9 +169,9 @@ jobs:
         module:
           - {name: "catalyst", args1: "catalyst/test", args2: ""}
           # sql_core-* set HEAP_SIZE / METASPACE_SIZE so SparkBuild.scala caps
-          - {name: "sql_core-1", args1: "", args2: "sql/testOnly * -- -l org.apache.spark.tags.ExtendedSQLTest -l org.apache.spark.tags.SlowSQLTest", heap: "4g", metaspace: "1g"}
-          - {name: "sql_core-2", args1: "", args2: "sql/testOnly * -- -n org.apache.spark.tags.ExtendedSQLTest", heap: "4g", metaspace: "1g"}
-          - {name: "sql_core-3", args1: "", args2: "sql/testOnly * -- -n org.apache.spark.tags.SlowSQLTest", heap: "4g", metaspace: "1g"}
+          - {name: "sql_core-1", args1: "", args2: "sql/testOnly * -- -l org.apache.spark.tags.ExtendedSQLTest -l org.apache.spark.tags.SlowSQLTest", heap: "3g", metaspace: "1g"}
+          - {name: "sql_core-2", args1: "", args2: "sql/testOnly * -- -n org.apache.spark.tags.ExtendedSQLTest", heap: "3g", metaspace: "1g"}
+          - {name: "sql_core-3", args1: "", args2: "sql/testOnly * -- -n org.apache.spark.tags.SlowSQLTest", heap: "3g", metaspace: "1g"}
           - {name: "sql_hive-1", args1: "", args2: "hive/testOnly * -- -l org.apache.spark.tags.ExtendedHiveTest -l org.apache.spark.tags.SlowHiveTest"}
           - {name: "sql_hive-2", args1: "", args2: "hive/testOnly * -- -n org.apache.spark.tags.ExtendedHiveTest"}
           - {name: "sql_hive-3", args1: "", args2: "hive/testOnly * -- -n org.apache.spark.tags.SlowHiveTest"}
@@ -223,9 +223,7 @@ jobs:
           if [ "${{ inputs.spark-short }}" != "4.0" ] || [ "${{ inputs.java }}" != "21" ]; then
             export SERIAL_SBT_TESTS=1
           fi
-          # Per-row forked-test-JVM caps (read by Spark's SparkBuild.scala). Only
-          # exported when the matrix entry sets them; rows without these fields
-          # keep Spark's defaults (-Xmx4g, -XX:MaxMetaspaceSize=1300m).
+          # Per-row forked-test-JVM caps (read by Spark's SparkBuild.scala). 
           if [ -n "${{ matrix.module.heap }}" ]; then
             export HEAP_SIZE="${{ matrix.module.heap }}"
           fi
@@ -247,10 +245,23 @@ jobs:
           # The build-jvm job pre-compiled Spark sources and Test classes, so
           # SBT here only orchestrates `testOnly` — Zinc verifies "no changes"
           # against the unpacked apache-spark/ tree and skips compilation. We
-          # cap SBT heap at 1536 MB (down from 3072 MB) so the freed RAM goes
+          # cap SBT heap so the freed RAM goes
           # to the forked test JVM and OS/container overhead, fixing the
           # cgroup-OOM SIGKILLs we saw on sql_core-* under 7 GB runners.
-          SBT_MEM: "1536"
+          SBT_MEM: "1024"
+          # G1GC + tuning for the SBT orchestrator JVM. -Xss4m replaces the
+          # launcher's -Xss64m default (no compile here, deep recursion not
+          # needed). UseStringDeduplication and MaxMetaspaceSize cap real
+          # and ceiling footprint. ExitOnOutOfMemoryError fails fast.
+          SBT_OPTS: >-
+            -Xss4m
+            -XX:+UseG1GC
+            -XX:+UseStringDeduplication
+            -XX:MaxMetaspaceSize=384m
+            -XX:G1HeapRegionSize=2m
+            -XX:InitiatingHeapOccupancyPercent=35
+            -XX:+ParallelRefProcEnabled
+            -XX:+ExitOnOutOfMemoryError
           # Mirror Spark's own JDK 21 / 25 CI workaround. apache/spark's
           # build_java21.yml and build_java25.yml set this same env var to
           # process-isolate the V1/V2 Parquet and Orc source suites because

dev/diffs/3.4.3.diff

@@ -1,5 +1,5 @@
 diff --git a/pom.xml b/pom.xml
-index d3544881af1..1126f287096 100644
+index d3544881af1..aae0ae3b27b 100644
 --- a/pom.xml
 +++ b/pom.xml
 @@ -148,6 +148,8 @@
@@ -2977,7 +2977,7 @@ index dd55fcfe42c..d9a3f2df535 100644
 
      spark.internalCreateDataFrame(withoutFilters.execute(), schema)
 diff --git a/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala b/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
-index ed2e309fa07..25b798d2c1c 100644
+index ed2e309fa07..0658bfe9e12 100644
 --- a/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
 +++ b/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
 @@ -74,6 +74,20 @@ trait SharedSparkSessionBase
@@ -2996,7 +2996,7 @@ index ed2e309fa07..25b798d2c1c 100644
 +        .set("spark.shuffle.manager",
 +          "org.apache.spark.sql.comet.execution.shuffle.CometShuffleManager")
 +        .set("spark.comet.exec.shuffle.enabled", "true")
-+        .set("spark.comet.memoryOverhead", "10g")
++        .set("spark.comet.memoryOverhead", "2g")
 +    }
      conf.set(
        StaticSQLConf.WAREHOUSE_PATH,

dev/diffs/3.5.8.diff

@@ -1,5 +1,5 @@
 diff --git a/pom.xml b/pom.xml
-index edd2ad57880..15a0947abf4 100644
+index edd2ad57880..a47b7dec672 100644
 --- a/pom.xml
 +++ b/pom.xml
 @@ -152,6 +152,8 @@
@@ -2926,7 +2926,7 @@ index e937173a590..263934fbe7b 100644
 
      spark.internalCreateDataFrame(withoutFilters.execute(), schema)
 diff --git a/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala b/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
-index ed2e309fa07..25b798d2c1c 100644
+index ed2e309fa07..0658bfe9e12 100644
 --- a/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
 +++ b/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
 @@ -74,6 +74,20 @@ trait SharedSparkSessionBase
@@ -2945,7 +2945,7 @@ index ed2e309fa07..25b798d2c1c 100644
 +        .set("spark.shuffle.manager",
 +          "org.apache.spark.sql.comet.execution.shuffle.CometShuffleManager")
 +        .set("spark.comet.exec.shuffle.enabled", "true")
-+        .set("spark.comet.memoryOverhead", "10g")
++        .set("spark.comet.memoryOverhead", "2g")
 +    }
      conf.set(
        StaticSQLConf.WAREHOUSE_PATH,

dev/diffs/4.0.2.diff

@@ -39,7 +39,7 @@ index 6c51bd4ff2e..e72ec1d26e2 100644
        withSpark(sc) { sc =>
          TestUtils.waitUntilExecutorsUp(sc, 2, 60000)
 diff --git a/pom.xml b/pom.xml
-index 252cfdf9073..64e899efe6b 100644
+index 252cfdf9073..60cb9dcb7cf 100644
 --- a/pom.xml
 +++ b/pom.xml
 @@ -148,6 +148,8 @@
@@ -3590,7 +3590,7 @@ index f0f3f94b811..b7d18771314 100644
 
      spark.internalCreateDataFrame(withoutFilters.execute(), schema)
 diff --git a/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala b/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
-index 245219c1756..b566f970ccd 100644
+index 245219c1756..2213d438a0c 100644
 --- a/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
 +++ b/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
 @@ -75,6 +75,21 @@ trait SharedSparkSessionBase
@@ -3609,7 +3609,7 @@ index 245219c1756..b566f970ccd 100644
 +        .set("spark.shuffle.manager",
 +          "org.apache.spark.sql.comet.execution.shuffle.CometShuffleManager")
 +        .set("spark.comet.exec.shuffle.enabled", "true")
-+        .set("spark.comet.memoryOverhead", "10g")
++        .set("spark.comet.memoryOverhead", "2g")
 +
 +    }
      conf.set(

dev/diffs/4.1.2.diff

@@ -39,7 +39,7 @@ index 6df8bc85b51..dabb75e2b75 100644
        withSpark(sc) { sc =>
          TestUtils.waitUntilExecutorsUp(sc, 2, 60000)
 diff --git a/pom.xml b/pom.xml
-index dc201151999..3e278cfb34c 100644
+index dc201151999..d5c08f11ded 100644
 --- a/pom.xml
 +++ b/pom.xml
 @@ -152,6 +152,8 @@
@@ -885,7 +885,7 @@ index 53e47f428c3..a55d8f0c161 100644
      assert(shuffleMergeJoins.size == 1)
    }
 diff --git a/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
-index 885512d4d19..113ae17ad9f 100644
+index 885512d4d19..09b1ccaed71 100644
 --- a/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
 +++ b/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
 @@ -29,7 +29,8 @@ import org.apache.spark.sql.catalyst.analysis.UnresolvedRelation
@@ -1055,7 +1055,7 @@ index 885512d4d19..113ae17ad9f 100644
            // No extra shuffle before aggregation
            assert(collect(plan) { case _: ShuffleExchangeExec => true }.size === 0)
        }
-@@ -1501,7 +1523,8 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
+@@ -1501,7 +1526,8 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
            val plan = sql(getAggQuery(selectExpr, joinType)).queryExecution.executedPlan
            assert(collect(plan) { case _: BroadcastNestedLoopJoinExec => true }.size === 1)
            // Have shuffle before aggregation
@@ -1065,7 +1065,8 @@ index 885512d4d19..113ae17ad9f 100644
        }
 
        def getJoinQuery(selectExpr: String, joinType: String): String = {
-@@ -1530,9 +1556,15 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
+@@ -1529,10 +1555,16 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
+             "/*+ BROADCAST(right_t) */ k1 as k0"
            }
            val plan = sql(getJoinQuery(selectExpr, joinType)).queryExecution.executedPlan
 -          assert(collect(plan) { case _: BroadcastNestedLoopJoinExec => true }.size === 1)
@@ -1084,7 +1085,7 @@ index 885512d4d19..113ae17ad9f 100644
        }
 
        // Test output ordering is not preserved
-@@ -1541,9 +1567,12 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
+@@ -1541,9 +1573,12 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
            val selectExpr = "/*+ BROADCAST(left_t) */ k1 as k0"
            val plan = sql(getJoinQuery(selectExpr, joinType)).queryExecution.executedPlan
            assert(collect(plan) { case _: BroadcastNestedLoopJoinExec => true }.size === 1)
@@ -1099,7 +1100,7 @@ index 885512d4d19..113ae17ad9f 100644
        }
 
        // Test singe partition
-@@ -1553,7 +1582,8 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
+@@ -1553,7 +1588,8 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
             |FROM range(0, 10, 1, 1) t1 FULL OUTER JOIN range(0, 10, 1, 1) t2
             |""".stripMargin)
        val plan = fullJoinDF.queryExecution.executedPlan
@@ -1109,7 +1110,7 @@ index 885512d4d19..113ae17ad9f 100644
        checkAnswer(fullJoinDF, Row(100))
      }
    }
-@@ -1626,6 +1656,9 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
+@@ -1626,6 +1662,9 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
            Seq(semiJoinDF, antiJoinDF).foreach { df =>
              assert(collect(df.queryExecution.executedPlan) {
                case j: ShuffledHashJoinExec if j.ignoreDuplicatedKey == ignoreDuplicatedKey => true
@@ -1119,7 +1120,7 @@ index 885512d4d19..113ae17ad9f 100644
              }.size == 1)
            }
        }
-@@ -1670,14 +1703,20 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
+@@ -1670,14 +1709,20 @@ class JoinSuite extends QueryTest with SharedSparkSession with AdaptiveSparkPlan
 
    test("SPARK-43113: Full outer join with duplicate stream-side references in condition (SMJ)") {
      def check(plan: SparkPlan): Unit = {
@@ -1142,7 +1143,7 @@ index 885512d4d19..113ae17ad9f 100644
      }
      dupStreamSideColTest("SHUFFLE_HASH", check)
    }
-@@ -1813,7 +1852,8 @@ class ThreadLeakInSortMergeJoinSuite
+@@ -1813,7 +1858,8 @@ class ThreadLeakInSortMergeJoinSuite
        sparkConf.set(SHUFFLE_SPILL_NUM_ELEMENTS_FORCE_SPILL_THRESHOLD, 20))
    }
 
@@ -3849,7 +3850,7 @@ index f0f3f94b811..b7d18771314 100644
 
      spark.internalCreateDataFrame(withoutFilters.execute(), schema)
 diff --git a/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala b/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
-index 720b13b812e..71b20c79a12 100644
+index 720b13b812e..d08c2548ffa 100644
 --- a/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
 +++ b/sql/core/src/test/scala/org/apache/spark/sql/test/SharedSparkSession.scala
 @@ -98,6 +98,21 @@ trait SharedSparkSessionBase
@@ -3868,7 +3869,7 @@ index 720b13b812e..71b20c79a12 100644
 +        .set("spark.shuffle.manager",
 +          "org.apache.spark.sql.comet.execution.shuffle.CometShuffleManager")
 +        .set("spark.comet.exec.shuffle.enabled", "true")
-+        .set("spark.comet.memoryOverhead", "10g")
++        .set("spark.comet.memoryOverhead", "2g")
 +
 +    }
      conf.set(