Function TestMemoryLeaks_LiteralValuePool

pkg/sql/ast/pool_test.go:669–722

(t *testing.T)

}

func TestMemoryLeaks_LiteralValuePool(t *testing.T) {
	runtime.GC()
	runtime.GC()
	time.Sleep(10 * time.Millisecond)

	var m1 runtime.MemStats
	runtime.ReadMemStats(&m1)

	const iterations = 10000

	t.Logf("Running %d iterations of LiteralValue pool operations...", iterations)

	for i := 0; i < iterations; i++ {
		lit := GetLiteralValue()
		lit.Value = "test_value"
		lit.Type = "STRING"
		PutLiteralValue(lit)

		if i%1000 == 0 && i > 0 {
			runtime.GC()
		}
	}

	runtime.GC()
	runtime.GC()
	time.Sleep(10 * time.Millisecond)

	var m2 runtime.MemStats
	runtime.ReadMemStats(&m2)

	allocDiff := int64(m2.Alloc) - int64(m1.Alloc)
	totalAllocDiff := int64(m2.TotalAlloc) - int64(m1.TotalAlloc)
	bytesPerOp := float64(totalAllocDiff) / float64(iterations)

	t.Logf("LiteralValue pool memory stats:")
	t.Logf("  Alloc diff: %d bytes", allocDiff)
	t.Logf("  TotalAlloc diff: %d bytes", totalAllocDiff)
	t.Logf("  Bytes per operation: %.2f", bytesPerOp)

	const maxAllocIncrease = 512 * 1024 // 512KB
	const maxBytesPerOp = 3000          // 3KB

	if allocDiff > maxAllocIncrease {
		t.Errorf("Memory leak in LiteralValue pool: %d bytes (threshold: %d)", allocDiff, maxAllocIncrease)
	}

	if bytesPerOp > maxBytesPerOp {
		t.Errorf("High memory usage in LiteralValue pool: %.2f bytes/op (threshold: %d)", bytesPerOp, maxBytesPerOp)
	}

	if allocDiff <= maxAllocIncrease && bytesPerOp <= maxBytesPerOp {
		t.Logf("✅ LiteralValue pool memory leak test PASSED")
	}
}