Hey folks, We accidentally set the `cacheTtl` for a `KV.get()` to `300000s` (~3.5 days) instead of `

Hey folks,
We accidentally set the

cacheTtl

cacheTtl

cacheTtl

cacheTtl for a

KV.get()

KV.get()

KV.get()

KV.get() to

300000s

300000s

300000s

300000s (~3.5 days) instead of

300s

300s

300s

300s (5min). That resulted in caching the values and seeing stale data for longer than expected.
We went back and updated the

cacheTtl

cacheTtl

cacheTtl

cacheTtl to be

300

300 after a couple days when we realized there's an issue with stale data, but we are still seeing stale data regardless. The fix was merged more than 2h ago, and fetched some entries to reset the cacheTtl as the docs say here, but no luck.
Any idea how to fix this?

The effective cacheTtl of an already cached item can be reduced by getting it again with a lower cacheTtl. For example, if you did NAMESPACE.get(key, {cacheTtl: 86400}) but later realized that caching for 24 hours was too long, you could NAMESPACE.get(key, {cacheTtl: 300}) or even NAMESPACE.get(key) and it would check for newer data to respect the provided cacheTtl, which defaults to 60 seconds.

Cloudflare Docs

Read key-value pairs

To get the value for a given key, call the get() method of the KV binding on any KV namespace you have bound to your Worker code:

AAbdallah Abis Hey folks, We accidentally set the `cacheTtl` for a `KV.get()` to `300000s` (~3....

zecanard•6/20/25, 7:20 AM

I think it was Micky who created a ticket to look into this for me. The problem seemed to resolve itself after two weeks, then everything was working fine for a while. However, recently I made another update to my KV, and the problem reoccurred for a few days. So it doesn't seem to be fixed at all.

Zzecanard I think it was Micky who created a ticket to look into this for me. The problem ...

Abdallah AbisOP•6/20/25, 1:24 PM

Wow! 2 weeks!! OMG

.
Did you set the cacheTtl to 2 weeks that's why the cache lasted that long, or 2 weeks is just a random thing?

AAbdallah Abis Wow! 2 weeks!! OMG 🤯 . Did you set the cacheTtl to 2 weeks that's why the cache...

zecanard•6/20/25, 6:47 PM

It was just random. I use a TTL of one year, and expire my KV cache whenever I update the values.

omortis•6/22/25, 4:07 PM

So I get an error trying to use --remote--remote:

✘ [ERROR] In development, you should use a separate kv namespace than the one you'd use in production. Please create a new kv namespace with "wrangler kv namespace create <name> --preview" and add its id as preview_id to the kv_namespace "CROM" in your wrangler.json file

And I follow the instructions and update my wrangler.jsonc:

  "kv_namespaces": [
    {
      "binding": "CROM",
      "id": "cda6c32602a643b1ac92d1f8bac5abff",
      "preview_id": "721f44f1924843a68312f39dc99192a1"
    }
  ]

  "kv_namespaces": [
    {
      "binding": "CROM",
      "id": "cda6c32602a643b1ac92d1f8bac5abff",
      "preview_id": "721f44f1924843a68312f39dc99192a1"
    }
  ]

And I still get the same error? Am I missing something?

omortis•6/22/25, 4:07 PM

I am trying to run the code with npx wrangler dev --remotenpx wrangler dev --remote

omortis•6/22/25, 4:09 PM

CROM and CROM_preview both exist in my dashboard as expected.

omortis•6/22/25, 4:11 PM

Got it. Need to build first. I guess --remote requires the built project.

MY FRIEND (Thomas) ♥♥•6/26/25, 11:06 AM

hello

koraytaylan•6/26/25, 7:34 PM

i was trying to build a POC where i wanted to add items as a tree. keys would be /master/child1, /master/child2 and then i would call list with /master/ prefix to get the child item keys and since the doc says list will always return keys in alphabetical order, i was hoping when delete child1, the next list1 call would return /master/child2 as the first item. however, for about a minute the list calls keep returning /master/child1. is this the expected behavior? i was making the list calls from within a workflow if that might be a factor somehow. replaced kv calls with a simple insert, select for d1 in the very same setup and the problem went away which made me think there must be some sort of caching for kv then.

Roz•7/2/25, 1:20 PM

hey guys
I was wondering if there's a way, possibly through a support ticket, to get a dump of a KV namespace
I have tried exporting the data via a script, but since the API only allows reading 100 records at a time, and I have 1.96M keys, it's gonna take ages

Is there a better way?

Dubz•7/5/25, 10:27 PM

Does KV have any native backup systems by chance or is it expected to do this on your own?

vmg•7/10/25, 3:49 PM

im working on a monorepo with multiple workers, how do i get kv to work across workers with the same namespace in development?

ie, if I post something to kv in worker 1, can i get it in worker 2?

Vvmg im working on a monorepo with multiple workers, how do i get kv to work across w...

Hello, I’m Allie!•7/10/25, 4:50 PM

Use the same directory via —persist-to

Dubz•7/10/25, 7:07 PM

Is there any native way to rename ~~containers~~ namespaces? I know it's referenced by ID and names whatever in workers, but for the sake of naming consistency it would be nice if I could change the name on the dashboard but not the ID.

DDubz Is there any native way to rename ~~containers~~ namespaces? I know it's referen...

Hello, I’m Allie!•7/11/25, 12:45 AM

Did you mean to ask in #containers-beta ?

HHello, I’m Allie!Did you mean to ask in #containers-beta ?

Dubz•7/11/25, 12:48 AM

my bad I meant namespaces

DDubz my bad I meant namespaces 😭

Hard@Work•7/11/25, 3:22 AM

Rename Namespace | Namespaces | KV | Cloudflare API

Cloudflare API | KV › Namespaces › Rename A Namespace

Interact with Cloudflare's products and services via the Cloudflare API

Kkoraytaylan i was trying to build a POC where i wanted to add items as a tree. keys would be...

thomasgauvin•7/11/25, 3:06 PM

thanks for the feedback, we're working on it in the dashboard & wrangler!

HHard@Work [Rename Namespace | Namespaces | KV | Cloudflare API](https://developers.cloudfl...

Dubz•7/12/25, 8:57 PM

Might need updated to use the newer API keys instead of global API key, but it does seem to have worked for me. Would be nice to have added to wrangler CLI tho to streamline

Dubz•7/12/25, 9:01 PM

Would be nice if namespaces could be sorted by name rather than ID. Make life a little easier

LukeZ•7/14/25, 6:04 PM

Guys, why the hell is metadata a required field? What should I pass there?
Because I know what "Body param: Arbitrary JSON to be associated with a key/value pair." means but I don't know why that is necessary...

LukeZ•7/14/25, 6:06 PM

LLukeZ Guys, why the hell is metadata a required field? What should I pass there? Becau...

Isaac McFadyen•7/14/25, 6:29 PM

If you don't have any metadata, set to the empty object {}{}

Isaac McFadyen•7/14/25, 6:29 PM

It's basically extra data to be attached to the KV entry that you can see in a listlist call if you need to

LukeZ•7/14/25, 6:29 PM

I have to send an empty string, but thanks!

IIsaac McFadyen It's basically extra data to be attached to the KV entry that you can see in a `...

LukeZ•7/14/25, 6:30 PM

aaah, interesting

LLukeZ Guys, why the hell is metadata a required field? What should I pass there? Becau...

thomasgauvin•7/15/25, 1:05 PM

It's needed in the REST API (can be empty object like Isaac mentioned) but is there a reason you are using the REST API instead of the binding?

LukeZ•7/15/25, 1:19 PM

because it's not a worker and I don't have my app deployed on workers because it is too much work for this simple, single use case

Tony Leung•7/22/25, 6:25 PM

hi guys, will Cloudflare eventually support bulk delete or bulk put in cloudflare KV using in Workers? CF workers has a limitation of 6 concurrent connection at the same time and it's really painful to bulk put like 20 - 30 items using the SDK in workers.

TTony Leung hi guys, will Cloudflare eventually support bulk delete or bulk put in cloudflar...

Hard@Work•7/22/25, 6:45 PM

Maybe put your question in #community-q-and-a ?

HHard@Work Maybe put your question in #community-q-and-a ?

Tony Leung•7/22/25, 6:45 PM

thanks, chaika has already answered it

sorry for posting it off-topic

Hth4nh•7/24/25, 7:05 PM

Hello everyone,

I'm encountering an issue with the Cloudflare Worker KV where I get an empty array when trying to retrieve multiple keys at once.

When I run the following code, it returns an empty array:

const values = await options.env.TEST.get(["2930", "2929"]);
console.log([...values.entries()]); // []

// Expected: [["2930", "foo"],["2929","bar"]]

const values = await options.env.TEST.get(["2930", "2929"]);
console.log([...values.entries()]); // []

// Expected: [["2930", "foo"],["2929","bar"]]

However, this alternative approach works as expected:

const values = await Promise.all(["2930", "2929"].map((key) => options.env.TEST.get(key)));
console.log(values); // ["foo", "bar"]

const values = await Promise.all(["2930", "2929"].map((key) => options.env.TEST.get(key)));
console.log(values); // ["foo", "bar"]

According to the documentation, passing an array of keys to the get()get() method should return a MapMap of the key-value pairs.

Here is my wrangler.jsoncwrangler.jsonc file for reference:

{
    "$schema": "node_modules/wrangler/config-schema.json",
    "name": "***",
    "main": "./src/index.ts",
    "compatibility_date": "2025-06-20",
    "observability": {
        "enabled": true
    },
    "assets": {
        "directory": "./public/",
        "binding": "ASSETS"
    },
    "kv_namespaces": [
        {
            "binding": "TEST",
            "id": "***",
            "preview_id": "***"
        }
    ]
}

{
    "$schema": "node_modules/wrangler/config-schema.json",
    "name": "***",
    "main": "./src/index.ts",
    "compatibility_date": "2025-06-20",
    "observability": {
        "enabled": true
    },
    "assets": {
        "directory": "./public/",
        "binding": "ASSETS"
    },
    "kv_namespaces": [
        {
            "binding": "TEST",
            "id": "***",
            "preview_id": "***"
        }
    ]
}

I've also made sure that the preview_idpreview_id is correctly configured for use with

wrangler dev

wrangler dev

.

Has anyone else experienced this issue or has any idea what might be going wrong?

Thanks

mr.niko.la•8/1/25, 2:28 AM

Is kv able to temp hold 25mb file ?

For <60s

mr.niko.la•8/1/25, 2:28 AM

I need failover for r2 upload and prefer to use cf infra for latency before trying another s3

Mmr.niko.la Is kv able to temp hold 25mb file ? For <60s

Isaac McFadyen•8/1/25, 4:25 AM

25mb is the limit per KV value. It can hold any value up to 25mb indefinitely, yes.

Pingu•8/5/25, 5:07 PM

Do KV key expirations count as deletes for billing purposes?

cosbgn•8/7/25, 8:45 AM

Is KV down?

Ccosbgn Is KV down?

Isaac McFadyen•8/7/25, 1:38 PM

Are you still seeing these issues?

Original message was deleted

Hard@Work•8/7/25, 6:34 PM

?pings

SuperHelpflare•8/7/25, 6:34 PM

Please do not ping community members for non-moderation reasons. Doing so will not solve your issue faster and will make people less likely to want to help you.

IIsaac McFadyen Are you still seeing these issues?

cosbgn•8/7/25, 6:46 PM

Last was 21h ago

yevgen•8/12/25, 9:25 AM

In case you missed it last week: https://blog.cloudflare.com/rearchitecting-workers-kv-for-redundancy/

The Cloudflare Blog

Redesigning Workers KV for increased availability and faster perfor...

Workers KV is Cloudflare's global key-value store, serving millions of requests per second across hundreds of billions of stored objects. The service powers critical infrastructure for dozens of Cloudflare products—from Access authentication to Pages static assets—making its availability essential to our platform's reliability.

After the in...

alison•8/18/25, 8:50 PM

There's a relatively well-documented issue with writing to KV where metadatametadata is supposedly optional, but required in the type definition within the cloudflare-typescriptcloudflare-typescript library.

Easy, right? Just pass in a dummy empty metadatametadata object on your writes to KV! WRONG!!

If you just do that, your value gets stored in KV as an object like { value: XYZ, metadata: {}}{ value: XYZ, metadata: {}}. Not super intuitive, I'd rather just store XYZ. So then I learned:

When passing in metadatametadata, you actually need to include the Content-Type: multipart/form-metadataContent-Type: multipart/form-metadata header (image 1, link). The library has some handling for automatically including this header, but it doesn't catch these cases where we're forced to pass in empty metadata

Logical next move is to just pass in the header. Ok cool, easy right? WRONG!

Now I get an error back:

{"code":10047,"message":"can not parse value and metadata from multipart request body: 'could not parse multipart request: 'no multipart boundary param in Content-Type''"}

{"code":10047,"message":"can not parse value and metadata from multipart request body: 'could not parse multipart request: 'no multipart boundary param in Content-Type''"}

Fair, but I feel I am entering hacky code land and am not exactly sure how to set and use a boundary param within the context of the API. Is it as easy as just passing something like Content-Type: multipart/form-data; boundary=asfghjklContent-Type: multipart/form-data; boundary=asfghjkl?

Has anyone run into this issue? If so, how did you fix it? Did you just take the L and take .value.value on your GET response from KV, potentially running into issues when this finally gets fixed? Or did you manually pass in a fancy header? Or something else I am forgetting?

Here are some previous issues where people encountered the same thing: https://github.com/cloudflare/cloudflare-go/issues/3911, https://github.com/cloudflare/cloudflare-python/issues/2519

shinshin•8/25/25, 9:52 AM

When calling get using a key obtained from the list, null may be returned even if the key exists. Is this behavior caused by KV consistency?

const keys = await env.NAMESPACE.list();

Promise.all(keys.map(async (key) => {
  const v = env.NAMESPACE.get(key.name);
  console.log(v);
}))

const keys = await env.NAMESPACE.list();

Promise.all(keys.map(async (key) => {
  const v = env.NAMESPACE.get(key.name);
  console.log(v);
}))

Sshinshin When calling get using a key obtained from the list, null may be returned even i...

Isaac McFadyen•8/25/25, 3:43 PM

Depends, if the key was recently written then yes.

Isaac McFadyen•8/25/25, 3:43 PM

If the key has been present for a while you should see it fine though.

João Castro•8/25/25, 11:26 PM

I don't understand much about how KV is built, but would having something like https://blog.cloudflare.com/instant-purge/ possible or would it break the fundamentals of how it works? Sometimes the 60s delay for revalidating keys can be pretty annoying

The Cloudflare Blog

Instant Purge: invalidating cached content in under 150ms

Today we’re excited to share that we’ve built the fastest cache purge in the industry. We now offer a global purge latency for purge by tags, hostnames, and prefixes of less than 150ms on average (P50), representing a 90% improvement since May 2022.

IIsaac McFadyen 25mb is the limit per KV value. It can hold any value up to 25mb indefinitely, y...

mr.niko.la•8/27/25, 1:12 PM

Basically in a hyper rare case r2 upload fails due some reason can kv be used as failover ? Is that even worth doing or is cf automatically doing that? Or is it better to use something like backblaze ?

ShaneCodes•8/28/25, 1:27 PM

We use a ton of KV at Zephyr and I'm always poking around local KVs and was having a really hard time find the resources with the way they're stored. The SQLite table which has the actual keys mapped to the blob id. So I made a vscode plugin to connect the two and let me search them. I don't know if anyone else would find it useful but wanted to share

https://marketplace.visualstudio.com/items?itemName=swalkerdev.cloudflare-kv-explorer

Cloudflare KV Explorer - Visual Studio Marketplace

Extension for Visual Studio Code - Browse and inspect Cloudflare Workers KV stores during local development with Wrangler

Hey folks, We accidentally set the `cacheTtl` for a `KV.get()` to `300000s` (~3.5 days) instead of `

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