Hacker News: arunmu

New comment by arunmu in "Pg_vectorsearch: An index that is faster than pgvector's IVFFlat and HNSW"

arunmu — Thu, 15 Oct 2026 01:00:58 +0000

Thanks. I wish you had gone into more details on why recall was bad and what scale etc so that current users could also identify their issues. Also, it seems the new index is memory based and does not scale on machines with lower memory by being built on disk data structure ?

New comment by arunmu in "Pg_vectorsearch: An index that is faster than pgvector's IVFFlat and HNSW"

arunmu — Wed, 14 Oct 2026 16:32:13 +0000

Didn't these guys also write pgvectorscale which seems to be unmaintained now ? Why a new index instead of adding onto or improving pgvectorscale?

New comment by arunmu in "Ten years of ClickHouse in open source"

arunmu — Fri, 19 Jun 2026 14:01:27 +0000

Were you using it for simple grep search or actually required advanced searching for eg: BM25. Clickhouse will only help you with grep like search from what I understand.

New comment by arunmu in "The Case Against PGVector"

arunmu — Mon, 03 Nov 2025 15:36:33 +0000

There is pgvectorscale from timescale which uses disk ann based data structure and has support for pre and post filtering.

New comment by arunmu in "BM25 Search in Postgres"

arunmu — Sat, 25 Oct 2025 05:04:20 +0000

Thanks. We are already using timescale postgres image for pgvectorscale with some customizations on tsvector and GIN indexes. Would be nice to have bm25 as well. Any specific reason why this was not made open source from the get go or is it the usual phased approach by Timescale (now Tigerdata)? If not, it is a worrying signal as the same could happen with pgvectorscale development as well.

Anyways really appreciate the free offerings by timescale. Really makes things easy.

New comment by arunmu in "BM25 Search in Postgres"

arunmu — Sat, 25 Oct 2025 00:32:21 +0000

I would very much like it if it was opensourced like pgvectorscale and timescale extension itself

BM25 Search in Postgres

arunmu — Sat, 25 Oct 2025 00:31:22 +0000

Article URL: https://www.tigerdata.com/blog/introducing-pg_textsearch-true-bm25-ranking-hybrid-retrieval-postgres

Comments URL: https://news.ycombinator.com/item?id=45700446

Points: 5

# Comments: 4

New comment by arunmu in "TimescaleDB helped us scale analytics and reporting"

arunmu — Wed, 09 Jul 2025 05:24:38 +0000

I am a big fan of cloudflare blogs. The tech blogs are usually highly detailed and there is so much to learn from those.

But this one, interesting but was not a practical choice at all from what I gather reading the blog. The reason given for not using Clickhouse which they are already using for analytics was vague and ambiguous. Clickhouse does support JSON which can be re-written into a more structured table using MV. Aggregation and other performance tuning steps are bread and butter of using Clickhouse.

The decision to go with postgres and learn the already known limitations the hard way and then continue using it by bringing up a new technology (Timescale) does not sound good, assuming that Cloudflare at this point might already have lots of internal tools for monitoring clickhouse clusters.

TimescaleDB helped us scale analytics and reporting

arunmu — Wed, 09 Jul 2025 05:17:18 +0000

Article URL: https://blog.cloudflare.com/timescaledb-art/

Comments URL: https://news.ycombinator.com/item?id=44506539

Points: 4

# Comments: 2

New comment by arunmu in "Agentic patters from scratch using Groq"

arunmu — Thu, 03 Oct 2024 08:41:38 +0000

Thanks. I would have preferred to use Go instead of Python, but somehow the language is not picking up a lot in terms of new LLM frameworks.

As of now, I am using very light weight abstractions over prompts in python and that gets the job done. But, it is way too early and I can see how pipelining multiple LLM calls would need a good library that is not too complex and involved. In the end it is just a API call and you hope for the best result :)

New comment by arunmu in "Agentic patters from scratch using Groq"

arunmu — Thu, 03 Oct 2024 06:13:42 +0000

> No LangChain, no LangGraph, no LlamaIndex, no CrewAI

Bless you. Using these over complicated abstractions (except CrewAI which I haven't yet checked out) never made sense to me. I understand that LLM is no magic wand and there is a need to make it systematic rather than slapping prompts everywhere. But these frameworks are not the solution to it. Next I will be looking at is Microsofts semantic-kernel. Anybody has any good words for it ?

How not to write an async runtime in Rust

arunmu — Sun, 07 Apr 2024 01:30:00 +0000

Article URL: https://github.com/arun11299/How-not-to-async-rs

Comments URL: https://news.ycombinator.com/item?id=39957340

Points: 28

# Comments: 0

New comment by arunmu in "Cloudflare Log Explorer"

arunmu — Sat, 09 Mar 2024 14:58:52 +0000

I wonder why not clickhouse. Cloudflare has already deployed a lot of analytics services based on CH. Would have been nice if they could provide more details on that.

Cloudflare Log Explorer

arunmu — Sat, 09 Mar 2024 14:57:16 +0000

Article URL: https://blog.cloudflare.com/log-explorer

Comments URL: https://news.ycombinator.com/item?id=39651980

Points: 4

# Comments: 1

New comment by arunmu in "The pool of talented C++ developers is running dry"

arunmu — Wed, 02 Nov 2022 16:35:01 +0000

I have been a big fan of C++ and have had used it for about 8-9 years professionally as well as for side projects. The baggage that comes with it is just not worth it. My recommendation for any new project is to go either with Go or Rust as a C++ replacement unless the environment or hardware or resource constraints does not allow you otherwise.

As an individual developer, learning and being an expert in C++ intricacies is not worth the time and effort. Instead learn more about data layout in memory, hardware, language tooling etc and write code accordingly in a much better language as per the _need_ and C++ would really only qualify for very niche requirements.

New comment by arunmu in "4Bn rows/sec query benchmark: ClickHouse vs. QuestDB vs. Timescale"

arunmu — Sun, 05 Jun 2022 13:35:16 +0000

Really disappointing post from QuestDB. I would have expected them to do some research on how to design CH table schema before doing such kind of benchmark. The queries used does not take into account the primary key/order by fields. Based on query to be optimized, once could use Projections or MV. Perhaps a bit more work is needed, but that's the clickhouse way of doing it.

New comment by arunmu in "Comparing ClickHouse to PostgreSQL and TimescaleDB for time-series data"

arunmu — Thu, 21 Oct 2021 18:35:25 +0000

Thank you. My only nit is the way the ratio (CH/TS) is shown. What is the purpose of that ? It will show a bigger percentage for cases in which TS is better, but lower percentage for cases where CH is giving better results. From the data representation perspective, I do not thinnk that is fair.

New comment by arunmu in "Comparing ClickHouse to PostgreSQL and TimescaleDB for time-series data"

arunmu — Thu, 21 Oct 2021 17:30:38 +0000

What is the difference w.r.t the comparison done by Altinity of clickhouse with timescale ? Clickhouse performed better there for the same test. What gives ?

Hacker News: arunmu

New comment by arunmu in "Pg_vectorsearch: An index that is faster than pgvector's IVFFlat and HNSW"

New comment by arunmu in "Pg_vectorsearch: An index that is faster than pgvector's IVFFlat and HNSW"

New comment by arunmu in "Ten years of ClickHouse in open source"

New comment by arunmu in "The Case Against PGVector"

New comment by arunmu in "BM25 Search in Postgres"

New comment by arunmu in "BM25 Search in Postgres"

BM25 Search in Postgres

New comment by arunmu in "TimescaleDB helped us scale analytics and reporting"

TimescaleDB helped us scale analytics and reporting

New comment by arunmu in "Agentic patters from scratch using Groq"

New comment by arunmu in "Agentic patters from scratch using Groq"

How not to write an async runtime in Rust

New comment by arunmu in "Cloudflare Log Explorer"

Cloudflare Log Explorer

New comment by arunmu in "The pool of talented C++ developers is running dry"

New comment by arunmu in "4Bn rows/sec query benchmark: ClickHouse vs. QuestDB vs. Timescale"

New comment by arunmu in "Comparing ClickHouse to PostgreSQL and TimescaleDB for time-series data"

New comment by arunmu in "Comparing ClickHouse to PostgreSQL and TimescaleDB for time-series data"

New comment by arunmu in "ClickHouse vs. Pinot"

ClickHouse vs. Pinot