{ "schema": 1, "measured_local_date": "2026-09-15", "timezone": "Europe/Moscow", "machine": { "collected_at": "2026-09-14T22:59:52.259552+00:00", "model": "Mac15,10", "cpu": "Apple M3 Max", "physical_cpus": 14, "logical_cpus": 14, "memory_bytes": 38654705664, "macos_version": "26.5.2", "macos_build": "25F84", "docker_engine": "29.7.2", "docker_kernel": "7.0.12-linuxkit", "docker_arch": "aarch64", "docker_cpus": 14, "docker_memory_bytes": 8214323200, "other_running_containers": 10, "optimized_image_id": "sha256:6926a6db44663bf66f12ab07b432686b4cde79926b5cc7578f527109af46cc39", "baseline_image_id": "sha256:8b3292565b838dc3f2225301e550a39af0b5988f43b6e2ff64124db9294d10c7", "container_limits": { "NanoCpus": 0, "Memory": 0, "CpusetCpus": "", "ShmSize": 268435456, "Tmpfs": { "/var/lib/postgresql/data": "" } }, "go": "go version go1.27.1 darwin/arm64", "go_binary_sha256": { "linux_arm64": "9dbbb3a473685e8363181220763e417d3ede39925b5a1092babbff376abfb10b", "darwin_arm64": "33652f45280e397e4c9310292953af1583b207d7385614e0a399933f9e1c66b9" }, "client_source_ref": "7fe448f46fe990bbaf07c4c90e7cedb717e47886", "client_source_sha256": { "go.mod": "e127f5748e80dd183ffa43da158ae28cbde103e74ed612e6397d429573b830b1", "go.sum": "a5e7a8db07eba28dbde48bf9a54c4e9084a5a95ded581c0ff44c08b74e3dfe69", "main.go": "9b049b7c0ca69bb8dbe86221b3bcaac4fca1cb054dbd2ecc94c5e38b5f902abe", "resp.go": "7fb4fbf8ce553ae330e4547b9201baf8af70cd4fb3a4b5e6275a255d7000e33f", "resp_test.go": "1fa3d0f4d193c2504d88de075803adbee60a02688fc057f6f2977169b21d26c9" }, "go_binary_build_info": "/tmp/pglc-go-resp-linux: go1.27.1\n\tpath\tgithub.com/profundium/pg_local_cache/examples/go-pgx\n\tmod\tgithub.com/profundium/pg_local_cache/examples/go-pgx\t(devel)\t\n\tdep\tgithub.com/jackc/pgpassfile\tv1.0.0\th1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=\n\tdep\tgithub.com/jackc/pgservicefile\tv0.0.0-20240606120523-5a60cdf6a761\th1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=\n\tdep\tgithub.com/jackc/pgx/v5\tv5.11.0\th1:IzBBtyK9AHqf98cctWFifYSci2hgQR/cd56wB4p+ogg=\n\tdep\tgolang.org/x/text\tv0.29.0\th1:1neNs90w9YzJ9BocxfsQNHKuAT4pkghyXc4nhZ6sJvk=\n\tbuild\t-buildmode=exe\n\tbuild\t-compiler=gc\n\tbuild\tDefaultGODEBUG=cryptocustomrand=1,tlssecpmlkem=0,tracebacklabels=0,urlstrictcolons=0,x509sslcertoverrideplatform=0\n\tbuild\tCGO_ENABLED=0\n\tbuild\tGOARCH=arm64\n\tbuild\tGOOS=linux\n\tbuild\tGOARM64=v8.0\n\tbuild\tvcs=git\n\tbuild\tvcs.revision=53dbb3c43505034888019fbde808b2e167c22f1d\n\tbuild\tvcs.time=2026-09-14T21:42:32Z\n\tbuild\tvcs.modified=true\n/tmp/pglc-go-resp: go1.27.1\n\tpath\tgithub.com/profundium/pg_local_cache/examples/go-pgx\n\tmod\tgithub.com/profundium/pg_local_cache/examples/go-pgx\t(devel)\t\n\tdep\tgithub.com/jackc/pgpassfile\tv1.0.0\th1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=\n\tdep\tgithub.com/jackc/pgservicefile\tv0.0.0-20240606120523-5a60cdf6a761\th1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=\n\tdep\tgithub.com/jackc/pgx/v5\tv5.11.0\th1:IzBBtyK9AHqf98cctWFifYSci2hgQR/cd56wB4p+ogg=\n\tdep\tgolang.org/x/text\tv0.29.0\th1:1neNs90w9YzJ9BocxfsQNHKuAT4pkghyXc4nhZ6sJvk=\n\tbuild\t-buildmode=exe\n\tbuild\t-compiler=gc\n\tbuild\tDefaultGODEBUG=cryptocustomrand=1,tlssecpmlkem=0,tracebacklabels=0,urlstrictcolons=0,x509sslcertoverrideplatform=0\n\tbuild\tCGO_ENABLED=1\n\tbuild\tCGO_CFLAGS=\n\tbuild\tCGO_CPPFLAGS=\n\tbuild\tCGO_CXXFLAGS=\n\tbuild\tCGO_LDFLAGS=\n\tbuild\tGOARCH=arm64\n\tbuild\tGOOS=darwin\n\tbuild\tGOARM64=v8.0\n\tbuild\tvcs=git\n\tbuild\tvcs.revision=53dbb3c43505034888019fbde808b2e167c22f1d\n\tbuild\tvcs.time=2026-09-14T21:42:32Z\n\tbuild\tvcs.modified=true\n" }, "dataset": { "rows": 4096, "value_bytes": 128, "cache_entries": 1024, "cache_budget_mib": 1024, "resp_workers": 8 }, "measurement_notes": [ "Mac and Linux VM share physical CPUs; ten unrelated development containers remained running.", "Native Go runs in a separate cgroup, sharing only the PostgreSQL network namespace. Server CPU and memory exclude the client.", "The host and VM comparisons change both the network route and client OS/runtime placement; they do not isolate port-forwarder CPU.", "Network counters exclude loopback. In VM runs they omit benchmark traffic and include only other interface traffic, such as monitoring.", "PostgreSQL data and WAL are on tmpfs. fsync, full_page_writes and synchronous_commit remain enabled. No persistent-disk performance claim.", "Each primary case has three five-second samples, persistent connections, warmup, rotated query order, one outstanding request per connection and full JSON decoding.", "The initial optimized VM boot had slower 64-key SQL (19-21k requests/s). The same binary after restart recovered to 26-28k with identical data checksum, settings and prepared index plans. Root cause was not isolated. All runs remain here; reference tables use the faster repeated SQL run after restart, not the initial slowdown.", "Reference groups: one-key rows from initial_optimized_vm; 64-key rows from optimized_batch_reference. Both use extension f03ed22169c3841c45f439bff5e1d693bb4808a5 and GOMAXPROCS=8.", "Go binaries were built from the working tree before its benchmark changes were committed as client_source_ref. Embedded VCS stamps therefore say 53dbb3c and modified=true; their source matches client_source_ref. Binary hashes and actual build metadata are retained.", "No KVik binary was benchmarked. RESP and SQL do not offer identical transaction/session semantics." ], "runs": { "baseline_vm": { "schema": 1, "measured_at": "2026-09-14T22:48:51.082Z", "harness_ref": "7fe448f46fe990bbaf07c4c90e7cedb717e47886", "extension_ref": "53dbb3c43505034888019fbde808b2e167c22f1d", "environment": { "database": "pglc_demo", "marker": "pg_local_cache disposable demo", "extension_version": "2.0.2", "extension_build_id": "53dbb3c43505034888019fbde808b2e167c22f1d", "postgres_version": "16.15 (Debian 16.15-1.pgdg12+2)", "max_connections": 300, "reserved_connections": 3, "shared_buffers": "128MB", "health": { "ready": true, "max_clients": 512, "resp_enabled": true, "active_clients": 0, "workers_running": 8, "workers_configured": 8, "memory_budget_bytes": 1073741824, "estimated_memory_bytes": 349290144, "workers_with_incomplete_mappings": 0, "mapping_reload_incomplete_retries_total": 0 }, "other_sessions": 0, "node": "v24.18.0", "pg": "8.16.3", "client_placement": "Linux VM, separate client container, server network namespace" }, "workload": { "seconds": 5, "repeats": 3, "connections": [ 64, 256 ], "batches": [ 1, 64 ], "fixed_keys": true, "persistent_connections": true, "protocol": "prepared SQL and RESP2 MGET, no pipelining", "all_clients_decode_json_and_restore_positions": true, "server_sample_interval_ms": 500 }, "queries": { "mget_text": "SELECT local_cache.mget('public.items'::regclass, $1::bigint[]) AS rows", "mget_json": "SELECT array_to_json(local_cache.mget('public.items'::regclass, $1::bigint[])) AS rows", "postgres_any": "SELECT id::text AS key, row_to_json(i)::text AS row FROM public.items AS i WHERE id = ANY($1::bigint[])", "resp_mget": "MGET CRUD:pglc_demo.public.items:{\"id\":1} ..." }, "results": [ { "repeat": 1, "batch": 1, "clients": 64, "driver": "go-pgx", "mode": "postgres-any", "seconds": 5.000286544, "requests": 1398399, "requests_s": 279663.7728047771, "latency": { "samples": 1398399, "p50_ms": 0.173833, "p95_ms": 0.58125, "p99_ms": 1.054916 }, "client_cpu_cores": 3.9798479196915406, "threads": 8, "client_metadata": { "ready": true, "result_formats": { "mget": [ "binary" ], "postgres-any": [ "text", "text" ] }, "runtime": "go1.27.1", "gomaxprocs": 8 }, "counters": { "sql_cache_hits": 0, "sql_cache_misses": 0, "sql_cache_fills": 0, "sql_cache_bypasses": 0, "cache_hit": 0, "cache_miss": 0, "client_mget_keys": 0, "client_request_errors": 0, "client_limit_rejections": 0, "database_reads": 0 }, "server": { "window_seconds": 5.1510633750000006, "cpu_seconds": 41.956560999999965, "cpu_cores": 8.145223218108816, "cpu_capacity": 14, "cpu_percent_capacity": 58.1801658436344, "cpu_us_per_request": 30.00328304010512, "memory_mean_bytes": 383663786.6666667, "memory_peak_bytes": 385794048, "anon_peak_bytes": 276156416, "shmem_peak_bytes": 80457728, "file_peak_bytes": 81252352, "memory_limit_bytes": null, "io_read_bytes": 0, "io_write_bytes": 0, "network_rx_bytes": 4026, "network_tx_bytes": 2872, "throttled_seconds": 0, "memory_events": { "low": 0, "high": 0, "max": 0, "oom": 0, "oom_kill": 0, "oom_group_kill": 0, "sock_throttled": 0 }, "samples": [ { "at_ms": 0, "cpu_seconds": 292.142782, "throttled_seconds": 0, "cpu_capacity": 14, "memory_bytes": 384946176, "anon_bytes": 275603456, "shmem_bytes": 80457728, "file_bytes": 81252352, "memory_limit_bytes": null, "memory_events": { "low": 0, "high": 0, "max": 0, "oom": 0, "oom_kill": 0, "oom_group_kill": 0, "sock_throttled": 0 }, "rbytes": 786432, "wbytes": 8192, "rios": 65, "wios": 2, "rx_bytes": 315771342, "tx_bytes": 1814485374, "activity": [ { "state": "idle", "wait_event_type": "Client", "count": 64 } ] }, { "at_ms": 565.302291, "cpu_seconds": 296.699259, "throttled_seconds": 0, "cpu_capacity": 14, "memory_bytes": 384937984, "anon_bytes": 275816448, "shmem_bytes": 80457728, "file_bytes": 81252352, "memory_limit_bytes": null, "memory_events": { "low": 0, "high": 0, "max": 0, "oom": 0, "oom_kill": 0, "oom_group_kill": 0, "sock_throttled": 0 }, "rbytes": 786432, "wbytes": 8192, "rios": 65, "wios": 2, "rx_bytes": 315771768, "tx_bytes": 1814485663, "activity": [ { "state": "active", "wait_event_type": "Client", "count": 5 }, { "state": "active", "wait_event_type": null, "count": 1 }, { "state": "idle", "wait_event_type": "Client", "count": 48 }, { "state": "idle", "wait_event_type": null, "count": 10 } ] }, { "at_ms": 1071.620791, "cpu_seconds": 300.809216, "throttled_seconds": 0, "cpu_capacity": 14, "memory_bytes": 385302528, "anon_bytes": 276156416, "shmem_bytes": 80457728, "file_bytes": 81252352, "memory_limit_bytes": null, "memory_events": { "low": 0, "high": 0, "max": 0, "oom": 0, "oom_kill": 0, "oom_group_kill": 0, "sock_throttled": 0 }, "rbytes": 786432, "wbytes": 8192, "rios": 65, "wios": 2, "rx_bytes": 315772128, "tx_bytes": 1814485925, "activity": [ { "state": "active", "wait_event_type": "Client", "count": 6 }, { "state": "idle", "wait_event_type": "Client", "count": 56 }, { "state": "idle", "wait_event_type": null, "count": 2 } ] }, { "at_ms": 1586.147166, "cpu_seconds": 305.161147, "throttled_seconds": 0, "cpu_capacity": 14, "memory_bytes": 381427712, "anon_bytes": 272224256, "shmem_bytes": 80457728, "file_bytes": 81252352, "memory_limit_bytes": null, "memory_events": { "low": 0, "high": 0, "max": 0, "oom": 0, "oom_kill": 0, "oom_group_kill": 0, "sock_throttled": 0 }, "rbytes": 786432, "wbytes": 8192, "rios": 65, "wios": 2, "rx_bytes": 315772488, "tx_bytes": 1814486213, "activity": [ { "state": "active", "wait_event_type": "Client", "count": 4 }, { "state": "active", "wait_event_type": null, "count": 1 }, { "state": "idle", "wait_event_type": "Client", "count": 56 }, { "state": "idle", "wait_event_type": null, "count": 3 } ] }, { "at_ms": 2067.297375, "cpu_seconds": 309.139971, "throttled_seconds": 0, "cpu_capacity": 14, "memory_bytes": 381468672, "anon_bytes": 272228352, "shmem_bytes": 80457728, "file_bytes": 81252352, "memory_limit_bytes": null, "memory_events": { "low": 0, "high": 0, "max": 0, "oom": 0, "oom_kill": 0, 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"memory_events": { "low": 0, "high": 0, "max": 0, "oom": 0, "oom_kill": 0, "oom_group_kill": 0, "sock_throttled": 0 }, "rbytes": 786432, "wbytes": 8192, "rios": 65, "wios": 2, "rx_bytes": 315775008, "tx_bytes": 1814488040, "activity": [ { "state": "idle", "wait_event_type": "Client", "count": 64 } ] }, { "at_ms": 5151.063375000001, "cpu_seconds": 334.099343, "throttled_seconds": 0, "cpu_capacity": 14, "memory_bytes": 385794048, "anon_bytes": 276144128, "shmem_bytes": 80457728, "file_bytes": 81252352, "memory_limit_bytes": null, "memory_events": { "low": 0, "high": 0, "max": 0, "oom": 0, "oom_kill": 0, "oom_group_kill": 0, "sock_throttled": 0 }, "rbytes": 786432, "wbytes": 8192, "rios": 65, "wios": 2, "rx_bytes": 315775368, "tx_bytes": 1814488246, "activity": [ { "state": "idle", "wait_event_type": "Client", "count": 64 } ] } ] } }, { "repeat": 1, "batch": 1, "clients": 64, "driver": "go-pgx", "mode": "mget", "seconds": 5.000338128, "requests": 1043308, "requests_s": 208647.4900882943, "latency": { "samples": 1043308, "p50_ms": 0.258833, "p95_ms": 0.6725, "p99_ms": 1.159833 }, "client_cpu_cores": 3.5287125686953145, "threads": 8, "client_metadata": { "ready": true, "result_formats": { "mget": [ "binary" ], "postgres-any": [ "text", "text" ] }, "runtime": "go1.27.1", "gomaxprocs": 8 }, "counters": { "sql_cache_hits": 1043308, "sql_cache_misses": 0, "sql_cache_fills": 0, "sql_cache_bypasses": 0, "cache_hit": 0, "cache_miss": 0, "client_mget_keys": 0, "client_request_errors": 0, "client_limit_rejections": 0, "database_reads": 0 }, "server": { "window_seconds": 5.117591208, "cpu_seconds": 46.70098100000001, "cpu_cores": 9.125578636878105, "cpu_capacity": 14, "cpu_percent_capacity": 65.18270454912933, "cpu_us_per_request": 44.762410524984006, "memory_mean_bytes": 384294229.3333333, "memory_peak_bytes": 387211264, "anon_peak_bytes": 277233664, "shmem_peak_bytes": 80457728, "file_peak_bytes": 81252352, "memory_limit_bytes": null, "io_read_bytes": 0, "io_write_bytes": 0, 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