Bug fix release, especially in systemd integration for pmlogger farms. Adds new detailed processor frequency scaling metrics on Linux. Improvements to the pcp-atop and pcp-htop utilities.

New eBPF ELF binary PMDA based on libbpf. Improved pmdabcc memory footprint. Dynamic columns in pcp-htop allowing columns for any process metric in PCP. New Linux autogroup metrics. New and improved processor and block device saturation pmie rules.

New socket statistics utility - pcp-ss . New metric collector - denki denki (power), and updates to sockets, ds389, HA cluster and Linux kernel metrics. Further improvements to threading and memory handling in the pmproxy archive discovery services and REST API.

Minor bug fix release. Major performance optimizations for the pmproxy REST APIs, archive discovery and time series queries, as well as for the Linux proc metrics. Fixes and new configuration options for the pmrep utility.

Scalability and memory footprint improvements in the pmproxy service. pcp-atop allows process filtering based on state, sorting threads per process and additional reporting features (kernel wait channel symbol for blocked processes, VM OOM process killing, swap-cached, KSM, ZFS and zswap memory metrics, per-process locked memory and scheduler run delay metrics). pcp-htop added the SysArch Meter and ZFS ARC statistics. pmrep allows specifying instances with PID. New Linux kernel metrics for fibre channel HBAs, pseudo TTYs and much improved interrupts metric handling.

New Linux ZFS, High Availability (Pacemaker) and detailed sockets metrics. pmproxy memory management improvements.

Performance improvements and process network statistics support in the pcp-atop command. Experimental pcp-htop command added. Improvements to the pmproxy REST API for fast, scalable pmseries querying.