diff --git a/deps/oblib/src/lib/alloc/memory_dump.cpp b/deps/oblib/src/lib/alloc/memory_dump.cpp
index a176a6ccc9..0209216ada 100644
--- a/deps/oblib/src/lib/alloc/memory_dump.cpp
+++ b/deps/oblib/src/lib/alloc/memory_dump.cpp
@@ -613,11 +613,31 @@ void ObMemoryDump::handle(void *task)
         // chunk
         int cnt = 0;
         if (m_task->dump_all_) {
-          ret = ObMallocAllocator::get_instance()->get_chunks(chunks_, MAX_CHUNK_CNT, cnt);
+          int tenant_cnt = 0;
+          get_tenant_ids(tenant_ids_, MAX_TENANT_CNT, tenant_cnt);
+          std::sort(tenant_ids_, tenant_ids_ + tenant_cnt);
+          for (int tenant_idx = 0; tenant_idx < tenant_cnt; tenant_idx++) {
+            uint64_t tenant_id = tenant_ids_[tenant_idx];
+            for (int ctx_id = 0; ctx_id < ObCtxIds::MAX_CTX_ID; ctx_id++) {
+              auto ta =
+                ObMallocAllocator::get_instance()->get_tenant_ctx_allocator(tenant_id, ctx_id);
+              if (nullptr == ta) {
+                ta = ObMallocAllocator::get_instance()->get_tenant_ctx_allocator_unrecycled(tenant_id,
+                                                                                            ctx_id);
+              }
+              if (nullptr != ta) {
+                ta->get_chunks(chunks_, MAX_CHUNK_CNT, cnt);
+              }
+            }
+          }
         } else if (m_task->dump_tenant_ctx_) {
           auto ta = ObMallocAllocator::get_instance()->get_tenant_ctx_allocator(m_task->tenant_id_,
-                                                                                 m_task->ctx_id_);
-          if (ta != nullptr) {
+                                                                                m_task->ctx_id_);
+          if (nullptr == ta) {
+            ta = ObMallocAllocator::get_instance()->get_tenant_ctx_allocator_unrecycled(m_task->tenant_id_,
+                                                                                        m_task->ctx_id_);
+          }
+          if (nullptr != ta) {
             ta->get_chunks(chunks_, MAX_CHUNK_CNT, cnt);
           }
         } else {
diff --git a/deps/oblib/src/lib/alloc/ob_malloc_allocator.cpp b/deps/oblib/src/lib/alloc/ob_malloc_allocator.cpp
index 1874502a31..c6991f5b58 100644
--- a/deps/oblib/src/lib/alloc/ob_malloc_allocator.cpp
+++ b/deps/oblib/src/lib/alloc/ob_malloc_allocator.cpp
@@ -539,38 +539,6 @@ int ObMallocAllocator::set_tenant_ctx_idle(const uint64_t tenant_id,
   return ret;
 }
 
-int ObMallocAllocator::get_chunks(AChunk **chunks, int cap, int &cnt)
-{
-  int ret = OB_SUCCESS;
-  ObDisableDiagnoseGuard disable_diagnose_guard;
-  for (int64_t slot = 0; OB_SUCC(ret) && slot < PRESERVED_TENANT_COUNT; ++slot) {
-    ObTenantCtxAllocatorGuard tas[16]; // TODO: should be dynamic array, but enough so far
-    int tas_cnt = 0;
-    {
-      BucketRLockGuard guard(locks_[slot], GETTID() % BucketLock::BUCKET_COUNT);
-      ObTenantCtxAllocator *ta = allocators_[slot];
-      while (OB_SUCC(ret) && ta != nullptr && tas_cnt < ARRAYSIZEOF(tas)) {
-        tas[tas_cnt++] = ObTenantCtxAllocatorGuard(ta);
-        ta = ta->get_next();
-      }
-      if (tas_cnt >= ARRAYSIZEOF(tas)) {
-        LOG_WARN("array size not enough");
-        // ignore ret
-      }
-    }
-    while (OB_SUCC(ret) && tas_cnt--) {
-      auto ta = tas[tas_cnt].ref_allocator();
-      for (int64_t ctx_id = 0; OB_SUCC(ret) &&ctx_id < ObCtxIds::MAX_CTX_ID; ctx_id++) {
-        ta[ctx_id].get_chunks(chunks, cap, cnt);
-        if (cnt >= cap) {
-          ret = OB_SIZE_OVERFLOW;
-        }
-      }
-    }
-  }
-  return ret;
-}
-
 int64_t ObMallocAllocator::sync_wash(uint64_t tenant_id, uint64_t from_ctx_id, int64_t wash_size)
 {
   int64_t washed_size = 0;
diff --git a/deps/oblib/src/lib/alloc/ob_malloc_allocator.h b/deps/oblib/src/lib/alloc/ob_malloc_allocator.h
index 03de5ba863..a4ca14f986 100644
--- a/deps/oblib/src/lib/alloc/ob_malloc_allocator.h
+++ b/deps/oblib/src/lib/alloc/ob_malloc_allocator.h
@@ -133,7 +133,6 @@ public:
   void print_tenant_memory_usage(uint64_t tenant_id) const;
   int set_tenant_ctx_idle(
       const uint64_t tenant_id, const uint64_t ctx_id, const int64_t size, const bool reserve = false);
-  int get_chunks(AChunk** chunks, int cap, int& cnt);
   int64_t sync_wash(uint64_t tenant_id, uint64_t from_ctx_id, int64_t wash_size);
   int64_t sync_wash();
   int recycle_tenant_allocator(uint64_t tenant_id);