I am using Squid Cache: Version 3.HEAD-20140127-r13248 My cache dir is configured to use rock (Large rock with SMP): cache_dir rock /mnt/squid-cache 256000 max-size=4194304 My refresh pattern is permissive to cache all objects: refresh_pattern . 129600 100% 129600 ignore-auth I uploaded 30 GB of data via squid cache with PUT requests. >From storedir stats(squidclient mgr:storedir) it seems like each PUT is occupying 1 slot in rock cache. Is this a known bug? PUT requests should not increase cache usage right? Stats: by kid9 { Store Directory Statistics: Store Entries : 53 Maximum Swap Size : 209715200 KB Current Store Swap Size: 8960416.00 KB Current Capacity : 4.27% used, 95.73% free Store Directory #0 (rock): /mnt/squid-cache FS Block Size 1024 Bytes Maximum Size: 209715200 KB Current Size: 8960416.00 KB 4.27% Maximum entries: 13107199 Current entries: 560025 4.27% Used slots: 560025 4.27% Pending operations: 1 out of 0 Flags: } by kid9 Thanks, Rajiv