sysstat

sysstat main features: Includes four sets of monitoring tools (sar/sadc/sadf, iostat/tapestat/nfsiostat/cifsiostat, mpstat, pidstat) for global system performance analysis. Can monitor a vast array of different metrics: Input/output and transfer rate statistics (global, per device, per partition, per network filesystem, and per Linux task/PID) CPU statistics (global, per CPU, and per Linux task/PID), including support for virtualized architectures Memory, huge pages, and swap space utilization statistics Virtual memory, paging, and fault statistics Per-task (per PID) memory and page fault statistics Global CPU and page fault statistics Process creation activity Interrupt statistics Extensive network statistics: network interface activity; IP, TCP, ICMP, and UDP protocol traffic statistics based on the SNMPv2 standard, including IPv6-related NFS server and client activity. Socket statistics. Run queue and system load statistics. Kernel internal table utilization statistics. System and per-Linux task switching activity. Swap statistics. TTY device activity. Power management statistics (instantaneous and average CPU clock speed, fan speed, device temperature, voltage input, USB devices plugged into the system). Filesystem utilization (inodes and blocks). Tape drive statistics. Average statistics are calculated over the sampling period Most system statistics can be saved to a file for future inspection Configurable data history Dynamic detection of new devices Support for UP and SMP machines Support for hotplug and tickless CPUs 32-bit or 64-bit architectures Requires very little CPU time at runtime (written in C). Exports in various different formats (CSV, XML, JSON, etc.) Smart color output Internationalization support Many programs on the internet can use sysstat data to create graphs (isag is included with sysstat)

sysstat is a suite of performance monitoring tools for Linux, designed to provide comprehensive system performance analysis capabilities.