Runnin Squid 2.5STABLE7 on Linux. When I look at the memory usage of squid via top I see the following: 13866 squid 25 0 256M 226M 1372 D 21.7 11.2 153:57 0 squid When I look via mgr:info I see the following: Resource usage for squid: UP Time: 9600.075 seconds CPU Time: 9299.210 seconds CPU Usage: 96.87% CPU Usage, 5 minute avg: 95.74% CPU Usage, 60 minute avg: 95.96% Process Data Segment Size via sbrk(): 255797 KB Maximum Resident Size: 0 KB Page faults with physical i/o: 10441 Memory usage for squid via mallinfo(): Total space in arena: 255797 KB Ordinary blocks: 233705 KB 3587 blks Small blocks: 0 KB 0 blks Holding blocks: 10248 KB 10 blks Free Small blocks: 0 KB Free Ordinary blocks: 22091 KB Total in use: 243953 KB 92% Total free: 22091 KB 8% Total size: 266045 KB When I look at http://www.squid-cache.org/Doc/FAQ/FAQ-8.html, I see the following: [quote] Finally, you can ask the Squid process to report its own memory usage. This is available on the Cache Manager info page. Your output may vary depending upon your operating system and Squid version, but it looks similar to this: Resource usage for squid: Maximum Resident Size: 137892 KB Memory usage for squid via mstats(): Total space in arena: 140144 KB Total free: 8153 KB 6% If your RSS (Resident Set Size) value is much lower than your process size, then your cache performance is most likely suffering due to paging. [/quote] In top, the RSS is shown to be 226MB, in the mgr info, the Maximum RS is 0 KB. Which of the two should I believe? Joost