# Kong 1.4.0 - \[lua\] prometheus.lua:360: log\_error(): Error while setting 'no memory'

**URL:** <https://discuss.konghq.com/t/kong-1-4-0-lua-prometheus-lua-log-error-error-while-setting-no-memory/5113>\
**Category:** Questions\
**Created:** [December 10, 2019, 9:57pm UTC](https://discuss.konghq.com/t/kong-1-4-0-lua-prometheus-lua-log-error-error-while-setting-no-memory/5113 "2019-12-10T21:57:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![mikem](https://avatars.discourse-cdn.com/v4/letter/m/41988e/32.png) [@mikem](https://discuss.konghq.com/u/mikem)\
**Post date:** [December 10, 2019, 9:57pm UTC](https://discuss.konghq.com/t/kong-1-4-0-lua-prometheus-lua-log-error-error-while-setting-no-memory/5113/1 "2019-12-10T21:57:39Z")

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Hello,

We are running Kong 1.4.0 on linux. We are using the Prometheus plugin and are getting a ton of errors (has 3,099,482 in a day) similar to this below in the `/usr/local/kong/logs/error.log` file.

```
2019/12/10 21:41:10 [error] 13010#0: *8935225 [lua] prometheus.lua:360: log_error(): Error while setting 'latency_bucket{type="kong",service="my-cool-service",route="eb443bee-eea7-42e7-8512-91a7f8fa1030",le="60000.0"}' to '1': 'no memory' while logging request, client: 70.132.33.71, server: kong, request: "GET /api/my-cool-service/v2/historical HTTP/1.1", upstream: "http://10.252.235.119:80/v2/historical", host: "my-cool-domain.com"

```

When we run `curl http://localhost:8001/status` it shows Prometheus metrics of this below.

```
      "prometheus_metrics": {
    "allocated_slabs": "5.00 MiB",
    "capacity": "5.00 MiB"
  },

```

We found [https://github.com/Kong/kong/issues/4589](https://github.com/Kong/kong/issues/4589) that recommends to set `nginx_http_lua_shared_dict=prometheus metrics 10m` in /etc/kong/kong.conf file and restarting kong by running service kong stop and service kong start. That failed with the error below.

```
Error: could not prepare Kong prefix at /usr/local/kong: nginx configuration is invalid (exit code 1):

```

nginx: [emerg] invalid number of arguments in “lua\_shared\_dict” directive in /usr/local/kong/nginx-kong.conf:30  
nginx: configuration file /usr/local/kong/nginx.conf test failed

Run with --v (verbose) or --vv (debug) for more details  
Error: could not prepare Kong prefix at /usr/local/kong: nginx configuration is invalid (exit code 1):  
nginx: [emerg] invalid number of arguments in “lua\_shared\_dict” directive in /usr/local/kong/nginx- kong.conf:30  
nginx: configuration file /usr/local/kong/nginx.conf test failed

So we tried setting it to `lua_shared_dict=prometheus metrics 10m` and restarted kong. No error from kong restart, but that doesn’t update the prometheus metrics from the status and the errors in the log keep showing up.

Any ideas how to fix the no memory errors in the log for prometheus? We think increasing the lua\_shared\_dict limit will solve this issue. Our kong services are working just fine. Please advise.

Thank you,  
Mike

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**Author:** ![hbagdi](https://yyz2.discourse-cdn.com/flex036/user_avatar/discuss.konghq.com/hbagdi/32/562_2.png) [@hbagdi](https://discuss.konghq.com/u/hbagdi)\
**Post date:** [December 12, 2019, 10:03pm UTC](https://discuss.konghq.com/t/kong-1-4-0-lua-prometheus-lua-log-error-error-while-setting-no-memory/5113/2 "2019-12-12T22:03:40Z")

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You need `nginx_http_lua_shared_dict=prometheus_metrics 10m`.

Not the `_` before metrics.

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<div class="post-metadata">

**Author:** ![mikem](https://avatars.discourse-cdn.com/v4/letter/m/41988e/32.png) [@mikem](https://discuss.konghq.com/u/mikem)\
**Post date:** [December 12, 2019, 10:14pm UTC](https://discuss.konghq.com/t/kong-1-4-0-lua-prometheus-lua-log-error-error-while-setting-no-memory/5113/3 "2019-12-12T22:14:43Z")

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Hello @hbagdi,

That resolved my issue.

Thank you