Hi, I am using squid 2.6.STABLE 21 on linux. my squid.conf has the following settings: maximum_object_size_in_memory 10 KB cache_mem 3072 MB maximum_object_size 2000 MB minimum_object_size 0 After running squid for more than 1 months, I ran 'squidclient .... mgr:vm_objects' to look at the transit/hot object size. Even if I SET the maximum in-memory object size to 10 KB, squid HAD the following objects! (the diff of inmem_lo and inmem_hi is 299KB) KEY CD0154B911563741E3E69CDB2E2D6FF0 GET http://images.test.com/test_data/61/99/319.jpg STORE_OK IN_MEMORY SWAPOUT_NONE PING_DONE CACHABLE,DISPATCHED,VALIDATED LV:1232416172 LU:1232417107 LM:1231909989 EX:-1 0 locks, 0 clients, 6 refs Swap Dir -1, File 0XFFFFFFFF inmem_lo: 0 inmem_hi: 299187 swapout: 0 bytes queued In Squid, The Definitive Guide published by O'Reilly, maximum_object_size_in_memory is the diff of inmem_lo and inmem_hi. But the real implementation is seemed to be strange. Any help will be highly appreciated. Thanks in advance. Tawan Won