# Missing or changed metrics in percona mongdb exporter

**URL:** <https://forums.percona.com/t/missing-or-changed-metrics-in-percona-mongdb-exporter/12522>\
**Category:** MongoDB\
**Tags:** mongodb\
**Created:** [October 11, 2021, 3:56pm UTC](https://forums.percona.com/t/missing-or-changed-metrics-in-percona-mongdb-exporter/12522 "2021-10-11T15:56:48Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Nivi\_Mor](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/nivi_mor/32/4714_2.png) [@Nivi\_Mor](https://forums.percona.com/u/Nivi_Mor)\
**Post date:** [October 11, 2021, 3:56pm UTC](https://forums.percona.com/t/missing-or-changed-metrics-in-percona-mongdb-exporter/12522/1 "2021-10-11T15:56:48Z")

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Hi,

We’re using prometheus-mongodb-exporter. From what I understand, this chart uses the image ssheehy/mongodb-exporter which utilizes percona’s mongodb-exporter v.0.10.

We’ve come across an issue where the mongodb-exporter can’t handle large number of collections. The process just hangs. In the context of a helm chart, the pod just dies because readiness and liveness probes fail.

So we decided to use the bitnami mongodb-exporter which utilizes the latest version of percona’s mongdb-exporter. However, many metrics that were available in v.0.10 are not in the latest. We passed the flag --compatible-mode but still we don’t see metrics such as `mongodb_mongod_db_coll_count` and `mongodb_mongod_db_coll_size`.

Any ideas how / where I can find these metrics?

Thanks!

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**Author:** ![Ivan\_Groenewold](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/ivan_groenewold/32/6299_2.png) [@Ivan\_Groenewold](https://forums.percona.com/u/Ivan_Groenewold)\
**Post date:** [October 12, 2021, 2:32pm UTC](https://forums.percona.com/t/missing-or-changed-metrics-in-percona-mongdb-exporter/12522/2 "2021-10-12T14:32:07Z")

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Hi, there was a complete rewrite of the exporter after the 0.11 release. The compatible mode should address most of the metrics, but for the collstats metrics you need to use the exporter 0.20.8 at least and add the following flags:  
–discovering-mode --mongodb.collstats-colls=your\_db\_name

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<div class="post-metadata">

**Author:** ![Nivi\_Mor](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/nivi_mor/32/4714_2.png) [@Nivi\_Mor](https://forums.percona.com/u/Nivi_Mor)\
**Post date:** [October 13, 2021, 6:30am UTC](https://forums.percona.com/t/missing-or-changed-metrics-in-percona-mongdb-exporter/12522/3 "2021-10-13T06:30:43Z")

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Hi @Ivan_Groenewold!

Thank you so much for your reply. Yeah I figured that much, thanks for confirming.