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

v0.2.3

Fixed

• Deduplicate system collectors between shared and platform-specific task lists
• Prevent empty files in ZIP archive using lazy writer pattern

v0.2.2

Added

• databases_blk collector - block read/write statistics from pg_stat_database
• databases_tup collector - tuple operation statistics from pg_stat_database
• databases_xact collector - transaction commit/rollback counts from pg_stat_database

v0.2.1

Added

• pgstatviz.repl collector - replication statistics (standby lag, slot stats)
• pgstatviz.slru collector - SLRU cache statistics

v0.2.0

Added

• pg_stat_checkpointer collector (PostgreSQL 17+) - checkpoint operations
• pg_stat_io collector (PostgreSQL 16+) - I/O statistics by backend type
• pg_stat_wal collector (PostgreSQL 14+) - WAL generation statistics
• pg_postmaster_start_time() collector - server startup timestamp
• pg_stat_database per-database collector - conflicts, deadlocks, temp files

v0.1.0

radar is an agentless, zero-dependency diagnostic data collection tool for PostgreSQL and system metrics.

Key features:

• Collects system and PostgreSQL metrics for troubleshooting
• Archives data into a timestamped ZIP file
• Handles unavailable collectors gracefully
• Zero dependencies (static binary)