v0.3.0

Added

System (Linux)

• clocksource collector - current kernel clocksource (tsc/hpet/kvm-clock)
• diskstats collector - raw kernel I/O counters from /proc/diskstats
• free collector - memory usage summary
• io-queue-depth collector - I/O queue depth per block device
• lscpu collector - structured CPU topology (NUMA, cores, threads, caches)
• netstat-stats collector - protocol statistics (retransmits, drops)
• numactl collector - NUMA node layout and memory
• numastat collector - per-node memory allocation statistics
• pg-service-status collector - PostgreSQL systemd service status
• resolv.conf collector - DNS resolver configuration
• ss-listeners collector - listening sockets and ports
• ss-summary collector - socket statistics summary
• timedatectl collector - NTP sync and timezone status

System (macOS)

• memory-pressure collector - system memory pressure level
• netstat-stats collector - protocol statistics
• ulimit collector - resource limits

PostgreSQL

• connection_summary collector - connection distribution by state and wait event
• database_conflicts collector - recovery conflicts from pg_stat_database_conflicts
• database_sizes collector - disk usage per database
• file_settings collector - config file parse results from pg_file_settings
• shmem_allocations collector - shared memory breakdown from pg_shmem_allocations
• stat_progress_cluster collector - CLUSTER/VACUUM FULL progress
• stat_progress_create_index collector - CREATE INDEX progress
• stat_statements_calls collector - top 100 queries by call count (pg_stat_statements)
• stat_statements_max_time collector - top 100 queries by max execution time (pg_stat_statements)
• stat_statements_total_time collector - top 100 queries by total execution time (pg_stat_statements)
• tablespace_sizes collector - tablespace disk usage
• wal_position collector - WAL position and recovery state
• wal_receiver collector - standby WAL receiver status

Testing

• Duplicate archive path detection tests for system and PostgreSQL collectors