that basically ends up being 60 isolates globally right?

daveOP•6/13/25, 2:46 PM

bit confused on why hyperdrive can't scale connections very well here; if I have 1,000 requests in an Worker all at once, Hyperdrive can't handle that?

Ddave that basically ends up being 60 isolates globally right?

thomasgauvin•6/13/25, 2:50 PM

Connections are returned to the pool while being unused, so there is definitely more than 60-100 isolates at a time, and this is why we recommend against wrapping everything in a transactions to avoid exhausting connections https://developers.cloudflare.com/hyperdrive/configuration/how-hyperdrive-works/#pooling-mode

AJR•6/13/25, 2:55 PM

Part of the benefit of the split connection approach Hyperdrive uses. You can have a truly absurd number of isolates, the connections to origin are kept separately in their own pool and checked out for the minimum time needed to interact with the origin DB

11984 Ford Laser Durable Objects not suitable for this?

Dan (Openside)•6/13/25, 11:41 PM

you mean using DO for its databases? I need postgresql databases for our use case. If DO ever supports postgres then definitely might consider.

Matt 2•6/15/25, 12:08 PM

Hi, is there any examples of using hyperdrive in nextjs api?

Titan•6/16/25, 2:59 PM

can I connect to hyperdrive from within a worker while using a mysql2 pool? Kysely only supports using mysql connection pools and I'm getting a "the server closed the connection" error

omar•6/16/25, 4:27 PM

unable to configure Hyperdrive with RDS (MySQL) , error attached

Xxetic User agents in MySQL statements trigger `Error: Hyperdrive does not currently su...

AJR•6/19/25, 9:59 AM

Thanks for reporting this, I'll open an internal ticket to address it.

Alex•6/20/25, 6:53 AM

I am trying to make a new Hyperdrive config but I keep getting:

"Failed to connect to the provided database: Connecting to database via Cloudflare Tunnel failed: 403 Forbidden"

"Failed to connect to the provided database: Connecting to database via Cloudflare Tunnel failed: 403 Forbidden"

As far as I can tell I setup everything exactly as my previous configuration. Tunnel setup and access policies look identical. Runnign the tunnel with debug output yield nothing so I feel like something is going wrong inside zero trust but I can't figure it out...

So... apparently it takes a bit for a new access token to start working maybe? Waiting a few minutes and using an existing token it started working...

zerozerozeroone•6/25/25, 9:18 PM

I have a multi master galera cluster replicated between US, UK and Germany.

If I create hyperdrive connections, how would cloudflare manage the connections?
Is there any latency based routing where cloudflare will route use the lowest latency connection?
Can we define regions to help cloudflare use the closest one?

Zzerozerozeroone I have a multi master galera cluster replicated between US, UK and Germany. 1. ...

AJR•6/25/25, 9:20 PM

This sort of smart-routing for replicas isn't something Hyperdrive does today, but it's something we're considering for future work.

Studio Smith-Cordell•6/26/25, 3:44 PM

I set up Hyperdrive on a free plan and noticed that the usage limit isn't resetting daily. Is the free usage now monthly?

AJR•6/26/25, 3:46 PM

No, no changes have been made to our free plan support. That's very odd.

Mind sending me your Hyperdrive ID so I can take a look?

AAJR No, no changes have been made to our free plan support. That's very odd. Mind s...

Studio Smith-Cordell•6/26/25, 3:58 PM

4343d6bb4e5a4e0198eb23ef8dc30d50

SStudio Smith-Cordell 4343d6bb4e5a4e0198eb23ef8dc30d50

AJR•6/26/25, 5:29 PM

Just went and double checked, and I'm seeing at least some free tier Hyperdrives hitting their limit every day for the last 2 weeks, so it seems like resets are still happening as intended.

Can you elaborate a bit on what you're seeing that suggests that yours isn't? You're very far from hitting it, from what I can see.

AAJR Just went and double checked, and I'm seeing at least some free tier Hyperdrives...

Studio Smith-Cordell•6/26/25, 5:39 PM

Yes, very far from hitting it. Currently just testing, but was building all night and noticed it didn't reset at midnight UTC. I'm currently the only user as it's not live.

I'm not very concerned about hitting it. I'm about to migrate a personal site that gets quite a reasonable amount of traffic at certain times of the year, and was just wondering when I'll likely need to upgrade it in the future.

In the long run, I will potentially use Hyperdrive for client projects on their own Cloudflare instances, and again, it's useful to understand pricing to be able to communicate with clients about foreseeable future costs.

AAJR Just went and double checked, and I'm seeing at least some free tier Hyperdrives...

Studio Smith-Cordell•6/26/25, 6:02 PM

I've got a feeling the usage indicator on the top-level hyperdrive page in the dashboard is a rolling 24-hour time period rather than coinciding with the reset specified in the docs

SStudio Smith-Cordell I've got a feeling the usage indicator on the top-level hyperdrive page in the d...

AJR•6/26/25, 6:31 PM

I'll have to go take a look when I have some more spare cycles. My teammate did the Dash work for that one. I suspect you might be right, though.

AAJR I'll have to go take a look when I have some more spare cycles. My teammate did ...

Studio Smith-Cordell•6/26/25, 6:58 PM

Well, thank you for you and all your team's hard work. Love the CF platform

AgentCord•6/27/25, 8:18 PM

Is it better to use

pg

pg

library or

postgres

postgres

AJR•6/27/25, 8:30 PM

pg

pg

is preferable.

AAJR Sure, I can talk through that. It's very "in the weeds" and is definitely the so...

AJR•6/27/25, 8:31 PM

If you search in this channel you'll find discussions as to why. This is the most recent bit

Zetax•6/29/25, 6:59 PM

Will Hyperdrive support cache invalidation on writes/updates anytime soon? This is the only thing keeping me from enabling the cache on it. I'm currently caching via a custom cache built on durable objects on drizzle

ZZetax Will Hyperdrive support cache invalidation on writes/updates anytime soon? This ...

AJR•6/29/25, 8:14 PM

No, not very soon. While it would be relatively straightforward to invalidate all cached entries on any write, getting all the way down to schema-aware automatic cache invalidation on a distributed pooler+cache is a ton of complexity that we are being very cautious about taking on.

That said, increased flexibility on whether/how to read from or write to cache on individual queries is something that we're actively working on.

AAJR No, not very soon. While it would be relatively straightforward to invalidate a...

Zetax•6/29/25, 9:31 PM

That already sounds great, thank you

Jjschlesser Sorry if this isnt exactly a hyperdrive question. It seems like the most approp...

AJR•6/30/25, 9:21 PM

Are you planning to run with an untrusted cert when you deploy it? Or is this just a blocker for local dev?

AJR•6/30/25, 9:35 PM

The next thing I'd try here is

npx wrangler dev --remote

npx wrangler dev --remote

, to see if you need actual code changes.

note: this will spin up an actual (ephemeral) worker for you to dev with, so be cautious about pointing your connections to a staging instance or similar

AJR•6/30/25, 9:36 PM

database connection TLS in particular has a rough time on local dev for Workers right now, but

--remote

--remote

is usually much better behaved.

AJR•6/30/25, 10:00 PM

Ah, I knew someone had done this before. James wrote it up publicly too, how convenient.

https://blog.cloudflare.com/introducing-socket-workers/

The Cloudflare Blog

Making connections with TCP and Sockets for Workers

The ability to make TCP and QUIC client connections from within Workers and Durable Objects, as well as the ability to connect to Workers over TCP and QUIC without using HTTP, will be coming to Cloudflare Workers. However, there is much to consider and a lot to do to make it happen. Here’s a peek at what we’re working on.

AJR•6/30/25, 10:01 PM

Though, I won't pretend that's the easiest thing I've ever seen, either.

AJR•7/3/25, 8:14 PM

Hey @Hyperdrive ! New feature for managing connection limits just dropped:
https://developers.cloudflare.com/changelog/2025-07-02-hyperdrive-configurable-connection-count/

Please kick the tires and let us know how it works for you!

Bonus news for those who keep an eye on this channel: as a result of this work the limit overrides that the Hyperdrive team can do to support large traffic volumes can now be done in minutes, instead of taking a few hours to roll through, so if you have need of that please reach out.

Cloudflare Docs

Hyperdrive now supports configuring the amount of database connections

Hyperdrive configurations can now be set to use a specific number of connections to your origin database.

James•7/3/25, 8:17 PM

Love to see this, thank you! :MeowHeartCloudflare:

Alex•7/3/25, 8:53 PM

I think I can see exactly when this went live

https://screen.bouma.link/XjBnMv39lxpkny2HfM3c
Love to see this change but it also changes some stuff resulting in more errors.
Already adjusting my limits but only helped for a short period.

CleanShot Cloud

Screenshot 2025-07-03 at 22.52.37

Screenshot

AJR•7/3/25, 9:25 PM

I'm incredibly sorry to see that. Can you offer some more details about what you're seeing right now?

AJR•7/3/25, 9:30 PM

Also, if anyone besides @Alex has some error logs coinciding with the last ~5 hours, we'd like to hear about it.

AAJR Hey @Hyperdrive ! New feature for managing connection limits just dropped: http...

Studio Smith-Cordell•7/3/25, 9:51 PM

This is great! Out of interest, what was it set to before the change?

SStudio Smith-Cordell This is great! Out of interest, what was it set to before the change?

AJR•7/3/25, 10:00 PM

60 for paid, 20 for free

AAJR I'm incredibly sorry to see that. Can you offer some more details about what you...

Alex•7/3/25, 10:02 PM

It looks like setting lower limit and allowing a few more connection on my side resolved the issue. Currently have the limit set to 20 and allowed 35 on the MySQL user. Have not seen errors for the past ~2 hours now. So might be solved.
(and also learnt that I really need notifications when the error rate spikes like this

the notification of the changelog triggered me to look. Worker falls through to the origin though, so no biggy in this case for me)

Alex•7/3/25, 10:04 PM

That said. It would be cool to see some graphs on connection counts from the CF side and some details on what happens if I set this limit lower. Does that "just" increase query latency or will it eventually fail to execute queries if the traffic is large enough.

AJR•7/3/25, 10:14 PM

That's in the works. We didn't want to hold up the functionality on the observability, but stay tuned.

AAlex That said. It would be cool to see some graphs on connection counts from the CF ...

AJR•7/3/25, 10:16 PM

If you set it low enough, eventually queries will start to time out and fail, yes. We can't build up waiting queries indefinitely due to finite resources on each server, so we give them a 15 second timeout.

Alex•7/3/25, 10:18 PM

Very reasonable. Excellent!

AAJR Hey @Hyperdrive ! New feature for managing connection limits just dropped: http...

João Castro•7/4/25, 1:35 AM

Really nice!

ALECKS•7/7/25, 7:38 PM

How do you set a postgres schema when using hyperdrive? Normally I would run a

 SET search_path ..

 SET search_path ..

command but I believe that does not work... it being a session config and clients don't stay on a session.

that basically ends up being 60 isolates globally right?

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