← all runs
Cohere-1M — 2026-08-26
c8g.large · peak recall 0.9972 @ 0 QPS
“cohere-1m ladder: c8g.large 4 GiB”
QPS at recall
| Recall | Meerkat | pgvector HNSW (halfvec) | Δ vs best competitor |
|---|
| 0.90 | 354 | 10 | +3468% |
| 0.95 | 285 | 6 | +4436% |
| 0.99 | 116 | 2 | +5730% |
Latency at recall
| Meerkat | pgvector HNSW (halfvec) | Δ vs best competitor |
|---|
| @ recall 0.90 | | | |
| p50 | 2.72 ms | 97.88 ms | -97% |
| p95 | 4.80 ms | 154.63 ms | -97% |
| p99 | 6.03 ms | 187.88 ms | -97% |
| @ recall 0.95 | | | |
| p50 | 3.37 ms | 157.63 ms | -98% |
| p95 | 5.74 ms | 231.48 ms | -98% |
| p99 | 7.32 ms | 275.31 ms | -97% |
| @ recall 0.99 | | | |
| p50 | 8.66 ms | 507.19 ms | -98% |
| p95 | 11.66 ms | 687.86 ms | -98% |
| p99 | 13.28 ms | 757.38 ms | -98% |
All values are taken at exactly the stated recall: each configuration's own sweep is log-interpolated between its two surrounding measured points (measured values are used verbatim on an exact hit) and the best configuration at that recall is shown — values are never interpolated across different configurations. “—” means no single sweep spans that recall; nothing is extrapolated. Recall is distance-based (ann-benchmarks, tie-aware). Insert/update/delete workloads are not measured.
Interpolated on config — Meerkat @0.90: mkt-defaults-rerank-sweep · pgvector HNSW (halfvec) @0.90: hnsw-m24-halfvec · Meerkat @0.95: mkt-defaults-rerank-sweep · pgvector HNSW (halfvec) @0.95: hnsw-m24-halfvec · Meerkat @0.99: mkt-defaults-rerank-sweep · pgvector HNSW (halfvec) @0.99: hnsw-m24-halfvec
Plots
Pareto svg ·
Distance-recall svg ·
Per-config svgHost
| Instance type | c8g.large |
| Hostname | ip-172-31-11-119 |
| CPU | unknown (2 vCPU) |
| Memory | 4 GB |
| OS | Ubuntu 26.04 LTS |
| Kernel | 7.0.0-1011-aws |
Versions
| rekall | 0.1.0 (1834b41 / main) |
| PostgreSQL | PostgreSQL 18.6 (Ubuntu 18.6-1.pgdg26.04+2) on aarch64-unknown-linux-gnu, compiled by gcc (Ubuntu 15.2.0-16ubuntu1) 15.2.0, 64-bit |
| meerkat | 0.1.0 (12d8109) |
| pg_prewarm | 1.2 |
| vector | 0.8.6 |
Search
Instance settings (observed)
instance type c8g.large
vCPU (observed) 2
memory (observed) 3.7 GiB
cpu model unknown
kernel 7.0.0-1011-aws
data directory /var/lib/postgresql/18/main
mount point /
filesystem ext4
media unknown
device root
provisioned IOPS — not an EBS volume
PostgreSQL settings
checkpoint_completion_target = 0.9
cluster_name = 18/main
data_directory = /var/lib/postgresql/18/main
effective_cache_size = 3 GB
effective_io_concurrency = 200
huge_pages = try
jit = off
maintenance_io_concurrency = 200
maintenance_work_mem = 1 GB
max_connections = 100
max_parallel_maintenance_workers = 1
max_parallel_workers = 2
max_wal_size = 16 GB
random_page_cost = 1.1
server_version = 18.6 (Ubuntu 18.6-1.pgdg26.04+2)
shared_buffers = 1 GB
wal_level = replica
work_mem = 32 MB
