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| author | GitLab Bot <gitlab-bot@gitlab.com> | 2021-09-30 12:12:38 +0300 |
|---|---|---|
| committer | GitLab Bot <gitlab-bot@gitlab.com> | 2021-09-30 12:12:38 +0300 |
| commit | 5b80d465ae36e5f73ac974b20928aeac82634e20 (patch) | |
| tree | 72cb34e0c37b0d2c47581926d8e0a90ff6278224 /doc/development/service_ping | |
| parent | b920d2a9831056cdf907cf71fd25d94f0aaf1e6c (diff) | |
Add latest changes from gitlab-org/gitlab@master
Diffstat (limited to 'doc/development/service_ping')
| -rw-r--r-- | doc/development/service_ping/implement.md | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/development/service_ping/implement.md b/doc/development/service_ping/implement.md index d86b06a6965..d9e5e0cda90 100644 --- a/doc/development/service_ping/implement.md +++ b/doc/development/service_ping/implement.md @@ -340,6 +340,9 @@ WARNING: HyperLogLog (HLL) is a probabilistic algorithm and its **results always includes some small error**. According to [Redis documentation](https://redis.io/commands/pfcount), data from used HLL implementation is "approximated with a standard error of 0.81%". +NOTE: + A user's consent for usage_stats (`User.single_user&.requires_usage_stats_consent?`) is not checked during the data tracking stage due to performance reasons. Keys corresponding to those counters are present in Redis even if `usage_stats_consent` is still required. However, no metric is collected from Redis and reported back to GitLab as long as `usage_stats_consent` is required. + With `Gitlab::UsageDataCounters::HLLRedisCounter` we have available data structures used to count unique values. Implemented using Redis methods [PFADD](https://redis.io/commands/pfadd) and [PFCOUNT](https://redis.io/commands/pfcount). |