These limits apply on a per-property basis. You can increase certain limits (but not event/parameter character limits) by upgrading your property to Google Analytics 360.
Google Analytics doesn't log events, event parameters, and user properties that exceed the following limits. For example, Analytics doesn't process the 26th user property nor does it process an event name with more than 40 characters.
For detailed information about the error events that Analytics logs when you exceed the following collection limits, see Analytics Error Codes.
|Logged item||Limit (For 360 limits, go here)||Can I delete items if I'm close to the limit?|
|Distinctly named events||
500 per app instance (for app data streams)
There is no limit on the number of distinctly named events for web data streams.
|Length of event name||40 characters. If an event exceeds 40 characters, the event will not be reported as a conversion (if you mark the event as a conversion) because the appended "_c" will be missing.||N/A|
|Event parameters per event||25 event parameters||Yes|
|Length of event-parameter name||40 characters||N/A|
|Length of event-parameter value||100 characters||N/A|
|User properties||25 per property||No|
|Length of user-property names||24 characters||N/A|
|Length of user-property values||36 characters||N/A|
|Length of User-ID values||256 characters||N/A|
|Events per User per day (for app data streams)||500||N/A|
The character limits are the same for single-width character languages (e.g., English) and double-width character languages (e.g., Japanese).