diff --git a/core/box/tls_sll_drain_box.h b/core/box/tls_sll_drain_box.h
index 1548dd3a..b3c62a02 100644
--- a/core/box/tls_sll_drain_box.h
+++ b/core/box/tls_sll_drain_box.h
@@ -233,8 +233,9 @@ static inline uint32_t tiny_tls_sll_try_drain(int class_idx) {
     // Check if interval reached
     uint32_t interval = tls_sll_drain_get_interval();
     if (__builtin_expect(g_tls_sll_drain_counter[class_idx] >= interval, 0)) {
-        // Trigger drain (drain ~32 blocks for now, tune later)
-        uint32_t drained = tiny_tls_sll_drain(class_idx, 32);
+        // Trigger drain (drain ALL blocks to enable empty detection)
+        // batch_size=0 means drain all available blocks
+        uint32_t drained = tiny_tls_sll_drain(class_idx, 0);
 
         // Reset counter
         g_tls_sll_drain_counter[class_idx] = 0;
diff --git a/core/hakmem_shared_pool.c b/core/hakmem_shared_pool.c
index e3e162e4..a72f1f09 100644
--- a/core/hakmem_shared_pool.c
+++ b/core/hakmem_shared_pool.c
@@ -264,8 +264,8 @@ shared_pool_release_slab(SuperSlab* ss, int slab_idx)
     }
 
     if (dbg == 1) {
-        fprintf(stderr, "[SS_SLAB_EMPTY] ss=%p slab_idx=%d class=%d used=0 (releasing to pool)\n",
-                (void*)ss, slab_idx, meta->class_idx);
+        fprintf(stderr, "[SS_SLAB_EMPTY] ss=%p slab_idx=%d class=%d used=0 active_slabs_before=%u (releasing to pool)\n",
+                (void*)ss, slab_idx, meta->class_idx, ss->active_slabs);
     }
 
     uint32_t bit = (1u << slab_idx);