date_utc:        2026-09-27T21:49:05Z
host:            ip-172-31-13-165.us-east-2.compute.internal
instance_type:   c7i.8xlarge
kernel:          6.12.103-129.197.amzn2023.x86_64
cpu_model:       Intel(R) Xeon(R) Platinum 8488C
cpus:            32
sockets/numa:    1 1 
mem_total_gib:   61.8
hugepages:       HugePages_Total:=0 HugePages_Free:=0 Hugepagesize:=2048 
thp:             always [madvise] never
governor:        n/a
numa_balancing:  0
overcommit:      0
pg_numactl:      numactl --interleave=all (postmaster)
storage:
  NAME           SIZE TYPE MODEL                      MOUNTPOINT
  nvme0n1        150G disk Amazon Elastic Block Store 
  ├─nvme0n1p1    150G part                            /
  ├─nvme0n1p127    1M part                            
  └─nvme0n1p128   10M part                            /boot/efi
mdstat:
  Personalities : 
  unused devices: <none>
data_fs:         /dev/nvme0n1p1 xfs   150G   14G  137G  10% /
mentat_git:      d34e0177 + duckdb-quack backend
rustc:           rustc 1.90.0 (1159e78c4 2025-09-14)
python:          Python 3.11.16
duckdb:          1.5.5
sqlite(host py): 3.40.0
postgres:        n/a
pg_configure:    n/a

invocation 2026-09-27T21:49:05Z: PHASE=all SCALES='s' BACKENDS='duckdb-quack' cpu_affinity=0-31
  SCENARIOS='point_lookup ref_traversal aggregate predicate_scan pull as_of since input_bindings' EXTRA='write_mixed concurrency_sweep' CLIENTS='1 8 32 64 128' REPS=1 MIN_S=10 MIN_N=30 MAX_S=60
  PROBE_S=20 MIXED_S=60 MIXED_READERS=8 SUSTAINED_S=0 SUSTAINED_CLIENTS=32
  LOAD_MAX_S=5400 EXT_LOAD_MAX_S=5400 PG_LOAD_JOBS=32 EXT_SCENARIO_FILTER=''
  warmup=3 calls (discarded) seed=20260509

invocation 2026-09-27T21:54:01Z: PHASE=bench SCALES='m' BACKENDS='duckdb-quack' cpu_affinity=0-31
  SCENARIOS='point_lookup ref_traversal aggregate predicate_scan pull as_of since input_bindings' EXTRA='write_mixed concurrency_sweep' CLIENTS='1 8 32 64 128' REPS=1 MIN_S=10 MIN_N=30 MAX_S=60
  PROBE_S=20 MIXED_S=60 MIXED_READERS=8 SUSTAINED_S=300 SUSTAINED_CLIENTS=32
  LOAD_MAX_S=5400 EXT_LOAD_MAX_S=5400 PG_LOAD_JOBS=32 EXT_SCENARIO_FILTER=''
  warmup=3 calls (discarded) seed=20260509

invocation 2026-09-27T22:04:53Z: PHASE=sustained SCALES='m' BACKENDS='duckdb' cpu_affinity=0-31
  SCENARIOS='point_lookup ref_traversal aggregate predicate_scan pull as_of since input_bindings' EXTRA='write_mixed concurrency_sweep' CLIENTS='1 8 32 64 128' REPS=1 MIN_S=10 MIN_N=30 MAX_S=60
  PROBE_S=20 MIXED_S=60 MIXED_READERS=8 SUSTAINED_S=300 SUSTAINED_CLIENTS=32
  LOAD_MAX_S=5400 EXT_LOAD_MAX_S=5400 PG_LOAD_JOBS=32 EXT_SCENARIO_FILTER=''
  warmup=3 calls (discarded) seed=20260509