Hello, anyone is willing to comment on this Cyrus server load, or share theirs? Virtual machine on vSphere 5 with 2x 2 GHz vCPU; cyrus-imapd RPM 2.4.16; kernel 2.6.18 x64_64; 4 GB RAM. There are 150 simultaneous IMAP connections on average mostly coming from a webmail (openXchange), with 240 imapd processes. No POP3. Just one instance of cyrus. Messages come over LMTP at a rate of 1 msg/second, average of course. Data and metadata partitions are local to the virtual machine (not NFS), connected to a SAN via FC. The system has 20 data partitions (and 20 metadata), for a total of 3.8TB, of which 550GB are used. Mailboxes (accounts) sum up to 2000. What is bugging me is the system load that averages at 10 during peak hours. CPU usage is equally shared between user/system/idle. As reported by vmstat: us sy id wa st 33 31 32 4 0 These figures obviously vary each second, but don't go too far during peak hours. /proc/meminfo reports: MemTotal: 4043792 kB MemFree: 34416 kB Buffers: 305456 kB Cached: 2505672 kB SwapCached: 0 kB Active: 2393176 kB Inactive: 1083692 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 4043792 kB LowFree: 34416 kB SwapTotal: 4192956 kB SwapFree: 4192724 kB Dirty: 86608 kB Writeback: 0 kB AnonPages: 665816 kB Mapped: 95900 kB Slab: 445736 kB PageTables: 55056 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 6214852 kB Committed_AS: 1018640 kB VmallocTotal: 34359738367 kB VmallocUsed: 265672 kB VmallocChunk: 34359472247 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 Hugepagesize: 2048 kB The userbase is going to grow. Another group of 3500 users with 2TB/year traffic is going to go on a dedicated cyrus server, similar to the one detailed above. Not having a direct experience on large and active userbase under Cyrus, the load seems high compared to other solutions we know of. I would appreciate any input about the apparent ability of the current server to hold more users, or which debugging/characterization steps should be undertaken to further optimize our asset. The "Performance Notes" page has been studied and applied when possible. Thank you for reading so far and Season's Greetings, if applies. Paolo ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
