public void close() throws Exception {
        cleanup();
    }

    /**
     * Get total number of regions allocated
     *
     * @return total allocated regions
     */
    public long getTotalAllocated() {
        return totalAllocated.get();
    }

    /**
     * Get total number of regions released
     *
     * @return total released regions
     */
    public long getTotalReleased() {

        }
        
        while ((region = availableReceiveRegions.poll()) != null) {
            region.close();
            totalReleased.incrementAndGet();
        }
    }
    
    public long getTotalAllocated() { return totalAllocated.get(); }
    public long getTotalReleased() { return totalReleased.get(); }
    public long getActiveRegions() { return totalAllocated.get() - totalReleased.get(); }
}
```

        long initialAllocated = bufferManager.getTotalAllocated();

        // Allocate regions larger than pool buffer size to force new allocations
        RdmaMemoryRegion region1 = bufferManager.getSendRegion(131072); // 128KB > 64KB pool size
        RdmaMemoryRegion region2 = bufferManager.getSendRegion(131072); // Another large allocation

        assertTrue(bufferManager.getTotalAllocated() > initialAllocated, "Total allocated should increase");

            assertNotNull(recvRegion.getBuffer(), "Receive region buffer should not be null");

            // Test buffer pooling statistics
            long initialAllocated = bufferManager.getTotalAllocated();
            long initialActive = bufferManager.getActiveRegions();

            assertTrue(initialAllocated >= 2, "Should have allocated at least 2 regions");