The ES persistence execution is now asynchronous and the execution
latency only counts the time to insert the requests into the bulk
processor, instead of the time after the requests are flushed into the
storage, this patch fixes that issue.
There is the same issue in prepare latency but that needs more changes
so I'll leave it to another pull request.
Optimize metrics of minute dimensionality persistence.
- The value of metrics, which has declaration of the default value and current value equals the default value logically, the whole row wouldn't be pushed into database.
- Add self-observability `metrics_persistence_skipped` metric to measure the number of skipped metrics.
- SLA(percent function), Apdex, AvgLong(MAL mostly) metrics are mostly optimized because of this. Such as a full-failing error(0% successful rate) and unhealthy(apdex=0) are not costing the storage.
- Hour/Day dimensionalities metrics are not changed, as they cover long duration.
- Fix `max` function in OAL doesn't support negative long.
* Support `!= null` in OAL engine.
* Add `Message Queue Consuming Count` metric for MQ consuming service and endpoint.
* Add `Message Queue Avg Consuming Latency` metric for MQ consuming service and endpoint.
* Document with a new menu in the `tracing` catalog is added
* Refactor the OAL compiler context to improve readability. Usually, this could not be included in the change log, but considering this kind of refactor could cause not-found bugs, Adding this as a hit if we face some related issues in the future.
* Fix wrong generated codes of hashCode and remoteHashCode methods for numeric fields.
Enhance OAL engine core
* Fix `funcParamExpression` and `literalExpression` can't be used in the same aggregation function.
* Support cast statement in the OAL core engine.
* Support `(str->long)` and `(long)` for string to long cast statement.
* Support `(str->int)` and `(int)` for string to int cast statement.
* Support Long literal number in the OAL core engine.
* Support literal `string` as parameter of aggregation function.
* Add `attributeExpression` and `attributeExpressionSegment` in the OAL grammar tree to support `map` type for the
attribute expression.
Besides added UTs, I locally tested these OAL scripts
```
mq_consume_latency = from((str->long)Service.tag["transmission.latency"]).longAvg();
mq_consume_latency = from((long)Service.tag["transmission.latency"]).longAvg();
mq_consume_latency = from((str->long)Service.tag["transmission.latency"]).filter((str->long)tag["transmission.latency"] > 0L).longAvg();
```
* [maven-release-plugin] prepare release v8.8.0
* [maven-release-plugin] prepare for next development iteration
* Create changes-8.8.0.md
* Reset changelog for 8.9.0
kezhenxu94
吴晟 Wu Sheng
Daniel Qian
mrproliu
刘威
xuxiawei
liqiangz
Kirs
zhyyu
wankai123
zhang-wei
royal-dargon
xu1009
wallezhang
业余布道师
Jared Tan