Add request_duration_seconds metric #72

2021-05-07T10:11:58+02:00

electricdusk commented

2021-05-07 10:11:58 +02:00

This PR adds a new request_duration_seconds metrics, which records a histogram of the request latency, partitioned by status code and HTTP method.

This PR also refactors other parts of the metrics.go file.

This PR adds a new `request_duration_seconds` metrics, which records a histogram of the request latency, partitioned by status code and HTTP method. This PR also refactors other parts of the `metrics.go` file.

electricdusk force-pushed metrics from 46f26664a4 to ea8c22c37c

2021-05-07 10:14:51 +02:00

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mrngm approved these changes

2021-05-16 14:35:11 +02:00

metrics.go Outdated

						
				@@ -45,0 +47,4 @@

				// partitioned by type and state.

				//

				// Its values are computed on the fly by updateMetrics().

				var metricURLsTotalGauge = prometheus.NewGaugeVec(

mrngm commented

2021-05-16 14:33:56 +02:00

(technically, the PR is for request_duration_seconds, so anything other than that should be omitted... or change the PR title and description)

(technically, the PR is for `request_duration_seconds`, so anything other than that should be omitted... or change the PR title and description)

mrngm marked this conversation as resolved

metrics.go Outdated

						
				@@ -61,0 +86,4 @@

					for state := db.PasteStateUndef; state <= db.PasteStateDeleted; state++ {

						for ty := db.PasteTypeUndef; ty <= db.PasteTypeFileUpload; ty++ {

							var count int64

							query := mh.db.Unscoped().Model(&db.Paste{}).Where("type = ? AND state = ?", ty, state).Count(&count)

mrngm commented

2021-05-16 14:31:00 +02:00

Is it possible to query the database once, yielding all counts for all types and states?

electricdusk commented

2021-05-16 17:34:59 +02:00

I tried to find this, but thought it was not not possible. I have retried searching for this and found this: https://stackoverflow.com/a/19046871/5207081
That would fix this.

I tried to find this, but thought it was not not possible. I have retried searching for this and found this: https://stackoverflow.com/a/19046871/5207081 That would fix this.

mrngm commented

2021-05-16 18:29:02 +02:00

Ran this query on the test migration database:

sqlite> SELECT type, state, COUNT(*) FROM pastes GROUP BY type, state;
0|2|136  // type: undef      state: deleted
2|1|118  // type: redirect   state: present
3|1|1376 // type: fileupload state: present

Would that roughly be what you expect to get here?

Ran this query on the test migration database: ``` sqlite> SELECT type, state, COUNT(*) FROM pastes GROUP BY type, state; 0|2|136 // type: undef state: deleted 2|1|118 // type: redirect state: present 3|1|1376 // type: fileupload state: present ``` Would that roughly be what you expect to get here?

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mrngm requested changes

2021-05-16 14:37:58 +02:00

mrngm left a comment

See the other review comments.

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mrngm approved these changes