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ANNOUNCING APACHE FLUSS 1.0: REAL-TIME DATA FOUNDATION FOR AI

Apache Fluss 1.0 introduces a stateless Rust HTTP Gateway for metadata, table operations, and batch writes, alongside native Python access and deeper Flink, Spark, Hudi, and Paimon integration. It adds row and log TTLs, predicate pushdown, coordinator high availability, resource protection, and cleanup features, moving the project from incubator-era capabilities toward production real-time lakehouse workloads.

2026.09.24
fluss.apache.org15 min readTLDR Data

HIGH-THROUGHPUT OLTP IN THREE SIMPLE STEPS

High-throughput transaction systems benefit from co-design rather than copying a connection-pool pattern from a general-purpose database. TigerBeetle models linked transfers atomically, aggregates balances without scans, batches operations automatically while a request is in flight, and prefers time-ordered identifiers for fast idempotency checks. Its benchmark illustrates why batching and ordered IDs can matter more than adding clients.

2026.09.24
tigerbeetle.com6 min readTLDR Data

HOW ADAPTIVE TAIL SAMPLING WORKS IN THE OPENTELEMETRY COLLECTOR

Fixed-rate sampling often discards the rare traces needed in an incident, while ordinary tail sampling loses statistical weights. An adaptive tail sampler for the OpenTelemetry Collector buffers traces, applies ordered rules, and attaches W3C probability thresholds so downstream counts can be reweighted. It adapts by route and service, bounds memory under load, and is progressing upstream toward alpha.

2026.09.24
honeycomb.io7 min readTLDR Data

Sponsored

STAKEHOLDERS OFTEN SPOT BROKEN DATA BEFORE THE DATA TEAM DOES.

According to a Monte Carlo/Wakefield survey, 74% of organizations now report it. The failure is usually the ingestion path, not the dashboard. ‘Building a real-time data transport layer with Confluent Cloud and AWS' demonstrates the change-data-capture transport pattern. Read the tutorial in AWS Marketplace [5]. The Data Pipelines and Lineage guide goes a level up from the tutorial: lineage from source to AI agent response, data quality, pipeline observability. See the

2026.09.21
aws.amazon.comSponsorTLDR Data

TRAINING A 4B MODEL TO PRODUCE 81% FASTER QUERY PLANS THAN POSTGRES

A 4B Qwen model was trained with supervised fine-tuning and reinforcement learning to generate faster PostgreSQL query plans. Across 113 join-heavy queries, its best-of-three results achieved a 1.81x geometric mean speedup over PostgreSQL's default plans and reduced total workload latency by 44.7%, showing small models can learn useful database optimization strategies from execution-time feedback.

2026.09.21
rohanbansal.com21 min readTLDR Data

THE ARCHITECTURE OF NEKI

PlanetScale's Neki horizontally shards standard PostgreSQL while presenting applications with a single Postgres connection, using routers, sidecars, replication, and automated failover to manage distributed queries and availability. It can also reshard data, move tables, and perform online schema changes without taking the database offline.

2026.09.21
planetscale.com9 min readTLDR Data

SAVING ANOTHER 100TB OF RAM WITH MATH (AND RUST)

Consistent hashing smooths load by assigning each server many virtual points, but those points can become a major memory cost at global scale. Cloudflare reworked Pingora's hash-ring representation, sorting, and rollout path to reclaim more than 100 TB of RAM. The article connects the distribution math to a staged migration that contained cache churn and preserved rollback control.

2026.09.21
blog.cloudflare.com10 min readTLDR Data

DEBUGGING INCONSISTENT QUERY LATENCY ON A POSTGRESQL HYPERTABLE: WHAT WE LEARNED

A PostgreSQL hypertable query was fast by hand but intermittently stalled because JDBC prepared statements switched to generic plans. Without parameter values, the planner could not exclude old chunks and spent seconds planning instead of executing. Logging the bind phase exposed the fault, while disabling server-side prepared statements and reducing chunk count restored predictable latency.

2026.09.21
links.tldrnewsletter.com8 min readTLDR Data

TWO TECHNIQUES FOR WORKING WITH SYSTEM ONE MODELS

System One models act as fast, general-purpose classifiers that make many simple decisions in parallel rather than generating long responses. Two useful patterns are to give them layered goals for real-time tasks and use tournament-style comparisons when choosing the best option from a large set.

2026.09.21
seangoedecke.com9 min readTLDR Data

THE SPAN ATTRIBUTE THAT BLEW UP YOUR OBSERVABILITY BILL

A high-cardinality span attribute can quietly multiply metric series even when trace volume and sampling remain flat. Sampling reduces stored trace bytes, not the distinct label combinations produced upstream by span metrics. Keep identifiers on traces, bucket them before metrics aggregation, and set cardinality and expiration limits so one deployment cannot turn a temporary dimension into a lasting observability bill.

2026.09.21
thinhdanggroup.github.io7 min readTLDR Data

SATURATION AT GITHUB: THE SAGA CONTINUES

A GitHub outage was triggered when a background cleanup job saturated a shared database primary, while monitoring incorrectly showed the cluster as healthy because it only watched replica lag. Long request timeouts and repeated retries then amplified the failure, highlighting how partial health signals and retry storms can turn database saturation into a site-wide incident.

2026.09.21
surfingcomplexity.blog8 min readTLDR Data

Sponsored

📊 HOW MANY DASHBOARDS IS TOO MANY?

Every new monitoring tool, service, or "quick integration" adds another dashboard to the pile—and before you know it, you're spending more time switching between tools than actually building. With Microsoft Azure [13], your entire stack lives in one workspace: infrastructure, data, AI, and more. See how Azure brings it all

2026.09.21
links.tldrnewsletter.comSponsorTLDR Data

PG-JEV

pg-jev brings natural-language classification directly into PostgreSQL, letting you filter, rank, and classify rows with Jev-powered SQL functions that return calibrated probabilities instead of generated text. It batches and caches evaluations to make semantic queries practical without embeddings or vector indexes.

2026.09.21
github.comGitHub repositoryTLDR Data

CHARTS BUILT FOR CHAT

dbt Charts is an open-source, YAML-based dashboard language designed for humans and AI agents to build governed charts in code rather than through a BI interface. Dashboards stay auditable and version-controlled alongside dbt models, with validation catching broken queries and poor visualisations before they ship.

2026.09.21
dbtcharts.com6 min readTLDR Data

FASTER JSON PARSING WITH SVE2 ON ARM PROCESSORS

JSON ingestion often spends significant time locating structural characters before parsing values. A new simdjson implementation uses ARM SVE2's match instruction to classify those characters more directly, improving indexing throughput by 3-9% on Graviton 4 and 5. The full parser gain is smaller, but the patch shows how targeted SIMD changes can improve a heavily optimized data path.

2026.09.21
lemire.me5 min readTLDR Data

JEV FOR 10-K DATA EXTRACTION: FAST & CALIBRATED

Jev can act as a fast, inexpensive verification layer for extracting structured data from 10-K filings: another tool finds candidate values, then Jev selects the correct one and returns calibrated confidence. This avoids unreliable generate-and-parse loops while routing ambiguous cases to larger models or humans.

2026.09.21
mohammadsoleimanian.com7 min readTLDR Data

ADDING AN INDEX MADE THIS QUERY SLOWER

An index matching ORDER BY in Postgres can still hurt when the filtered rows sit far down that index: inspect Rows Removed by Filter, test representative parameters, and use a composite index that matches both the filter and ordering.

2026.09.21
milanjovanovic.tech3 min readTLDR Data

PGRUN

PGRun gives agents and CI fast, isolated Postgres branches from production, avoiding shared staging conflicts, and keeping production protected.

2026.09.21
pgrun.devToolTLDR Data

Today, that tradeoff no longer applies, and this Datadog report

breaks it down. See how you can: * Build dashboards to collate key monitoring data from 700+ integrations [6] and visualize it all in one place * Correlate traces, logs, and infrastructure metrics to get deeper context for troubleshooting * Utilize unified analytics visibility to maintain and optimize your business intelligence

2026.09.17
datadoghq.comTLDR Data

HOW WE BUILT LANGCHAIN'S PAID MEDIA AGENT

LangChain built a paid-media agent that analyzes campaign data, recommends changes, and applies approved actions, helping paid media reach 20% of its marketing pipeline while cutting qualified lead costs. Its key design principle is to use models for judgment, code for reliable calculations and safeguards, and human approvals for consequential actions.

2026.09.17
langchain.com19 min readTLDR Data

HOW TO RUN ON THREE CLOUDS AT ONCE, AND WHEN NOT TO (45 MINUTE PRESENTATION)

Form3 runs its payment platform active-active-active across AWS, Google Cloud, and Azure, treating each provider like an availability zone. Kubernetes, NATS JetStream, and CockroachDB span all three clouds, while custom DNS, networking, and disruption controls preserve quorum. Its US deployment deliberately uses active-standby instead, showing resilience architecture should follow regulatory needs, latency limits, and cost.

2026.09.17
infoq.comTLDR Data

FASTRP GRAPH EMBEDDINGS WITH APACHE DATAFUSION

Graph embeddings turn connected entities into vectors for similarity search, GraphRAG, and graph machine learning, but Node2Vec's random walks create huge intermediate datasets and scale poorly. FastRP replaces that pipeline with iterative neighbor aggregation. A Rust/DataFusion implementation runs out-of-core, matched Node2Vec-level predictive quality in small tests, and processed an eight-million-node graph in about 15 minutes.

2026.09.17
semyonsinchenko.github.io6 min readTLDR Data

HOW MANY LABELED EXAMPLES DOES A TEXT CLASSIFIER ACTUALLY NEED? I MEASURED IT

Before defaulting to an LLM for text classification, benchmark a cheap and near-instant classical model against your available labels, expected volume, and acceptable error rate. In a small support-ticket experiment, TF-IDF accuracy rose from 40% to 60% as training data increased from 2 to 10 examples per category, but intent-based ambiguities remained, suggesting a hybrid approach where LLMs bootstrap labels or handle difficult cases while the classical model processes routine ones.

2026.09.17
towardsdatascience.com7 min readTLDR Data

PLAN ADVICE IN POSTGRESQL 19

PostgreSQL 19's pg_plan_advice serializes join order, scan type, join method, and parallelism into replayable plan guidance, while pg_stash_advice applies it by query ID. Structural strings make plan diffs stable enough for CI and upgrades, but selective pinning matters: preserving one proven decision is safer than freezing every choice as data distributions and statistics change.

2026.09.17
tapoueh.org7 min readTLDR Data

WHY YOUR REDIS IS SLOW: IT IS SINGLE THREADED AND YOU SENT IT KEYS

Redis executes commands on a single thread, so one expensive operation such as KEYS, FLUSHALL, a large DEL, or an unbounded collection read can block every client and cause sudden latency spikes even when CPU and network usage look normal. Use SLOWLOG and LATENCY tools to find offenders, replace full scans with cursor-based SCAN commands, use UNLINK for large deletions, shard oversized keys, and disable dangerous commands in production.

2026.09.17
ankit-rana.com6 min readTLDR Data

YOU DON'T NEED TO MIGRATE THOSE 300 DASHBOARDS

Instead of migrating every legacy dashboard, move the trusted metrics, definitions, and business logic that power them. Keep only frequently used dashboards and let AI analytics handle one-off questions using the same governed context.

2026.09.17
hex.tech6 min readTLDR Data

DUCKDB SKILLS FOR CLAUDE CODE

When Claude Code needs to look at a data file, it writes a small Python script, runs it, reads the output, and guesses at column names and types along the way. The DuckDB team's plugin points the agent at the DuckDB CLI instead, so a local file, a remote file, or an Iceberg table behind a login is just a table it can query, with skills for format conversion, object storage, spatial data, documentation search, and session recall.

2026.09.17
duckdb.org4 min readTLDR Data

APACHE ICEBERG PYTHON 0.12.0 RELEASE

PyIceberg 0.12.0 adds REST-catalog views, conflict-aware commit retries, incremental append scans, Iceberg v3 geometry and geography types, and early use of the File Format API. Correctness fixes cover partition pruning, deletion vectors, manifests, timestamps, and conversions, while Python 3.14 and stronger CI and security support broaden production readiness.

2026.09.17
iceberg.apache.org2 min readTLDR Data

BYPASSING INFERENCE BOTTLENECKS WITH RETRIEVE-FOR-TRAIN

Search systems often need a useful set, not ten versions of the same result. They can ask an AI to explore several angles, but generating those searches one by one is slow and expensive. Retrieve-for-Train teaches a smaller model the exploration strategy ahead of time, letting it produce complementary searches together. Google reports broader result coverage with 12-20x lower query-generation latency.

2026.09.17
research.google6 min readTLDR Data

BEYOND THE MODEL: ENGINEERING AI INFRA WITH SCIENTIFIC JUDGEMENT

Airbnb turned a months-long, notebook-heavy process for analyzing support conversations into Insight Miner, an agent harness that encodes extract-embed-cluster workflows, prompt tuning, hard-example mining, and contrastive labeling. Investigations now run in days across languages and geographies, while reproducible traces let experts audit evidence and spend more time on ambiguous samples, hypotheses, and methodological improvements.

2026.09.17
airbnb.tech5 min readTLDR Data

LET POSTGRES ENFORCE TENANT ISOLATION

PostgreSQL row-level security can fail closed beneath EF Core query filters, blocking cross-tenant reads and writes even through raw SQL or attached entities when the application uses non-owner roles and reset tenant context on every pooled connection.

2026.09.17
milanjovanovic.tech4 min readTLDR Data

MY DUCKDB + AI WORKFLOW

A simple terminal workflow combining AI agents with DuckDB can handle fast, reliable analysis, data cleaning, and secure access without heavyweight tools or complex semantic layers.

2026.09.17
thefulldatastack.substack.com14 min readTLDR Data

Sponsored

BRANCH YOUR PRODUCTION DATABASE LIKE YOU BRANCH YOUR CODE

What if Postgres compute was stateless? Imagine a branch that is a metadata operation that runs in seconds, not hours. What if you could also run transactions and analytics on the same copy of data in real time without delays or CDC? One architecture, two problems solved.

2026.09.14
databricks.comSponsorTLDR Data

EVOLVING PINTEREST'S EMBEDDING RETRIEVAL PLATFORM

Pinterest's Manas retrieval platform serves billions of embeddings across Home Feed, Search, Related Pins, Ads, and Notifications. Quantization is cutting serving cost by 20–30%, SSD-backed ANN experiments reduce memory and CPU needs, and multi-embedding retrieval moves beyond single-vector two-tower matching toward richer candidate scoring.

2026.09.14
links.tldrnewsletter.com8 min readTLDR Data

DISKLESS KAFKA: WHAT HAPPENS WHEN BROKERS STOP OWNING THE DATA?

Diskless Kafka keeps the Kafka API while moving durable payload storage from broker-owned logs to object storage and strongly consistent metadata. The tradeoff is not just cheaper retention: batching, offset assignment, recovery, compaction, latency, and feature support all change, making diskless topics a per-workload storage choice rather than a universal Kafka replacement.

2026.09.14
softwaremill.com16 min readTLDR Data

THE UNBEARABLE LIGHTNESS OF ONE MORE INDEX

Coding agents now produce competent PostgreSQL schemas, but they tend to stack indexes onto hot operational tables. In a measured support-ticket workload, extra indexes nearly doubled update time and WAL while increasing VACUUM work. Index review needs write-path evidence, HOT-update awareness, and usage counters, not just fast read plans.

2026.09.14
boringsql.com11 min readTLDR Data

IT PASSED CI. IT PASSED YOUR EVALS. THE CUSTOMER STILL GOT THE WRONG ANSWER

AI agents can return successful, well-grounded responses that are still wrong because they retrieved invalid context or followed a faulty execution path. Debugging requires end-to-end traces of model calls, tool calls, retrieval inputs, and outputs, plus separate tests for deterministic system behavior and answer quality.

2026.09.14
thenewstack.io11 min readTLDR Data

Sponsored

STALE DATA MAKES AGENTS FAIL CONFIDENTLY

Most AI agents fail confidently, not loudly. They act on stale data and produce wrong refunds, outdated quotes, and contradictory decisions. A context engine [12] computes real-time values at the moment of each decision, so your agents act on current, accurate

2026.09.14
chalk.aiSponsorTLDR Data

118 MILLION QUERIES PER SECOND ON NEKI

PlanetScale set out to run 1 million queries per second against Neki, its new sharded Postgres, hit that on 5 shards almost immediately, then kept going until 512 shards were serving 118 million queries per second across 1.22 PiB of data. The workload is deliberately narrow: a single-shard point select fetching one row by primary key with no writes, joins, or cross-shard queries, which is what makes the scaling curve clean.

2026.09.14
planetscale.com9 min readTLDR Data