Grafana Query Filter

Grafana offers basic filtering for all the objects and fields via the filter options in the panel configuration. For information about fixed software releases, consult the Cisco bug ID(s) at the top of this advisory. So, we've instrumented Logstash configuration to generate and send the data, we've validated that InfluxDB is getting the data … now let's graph the data! Charting it in Grafana. ini' are managed via the 'values. Grafana is an open-source visualization tool that can be used on top of a variety of different time series data sources, including Prometheus. Grafana has a pretty advanced Graphite query editor which enables us to interact with the data with the help of expressions & functions. When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution. Adhoc filters can be added in the dashboard’s variables configuration, adhoc filters are one type of variable that can be configured. OpenTSDB was designed to efficiently combine multiple, distinct time series during query execution. You'll find comprehensive guides and documentation to help you start working with LightStep [𝑥]PM as quickly as possible, as well as support if you get stuck. get-aduser -filter * would have a very big performance penalty. This package provide files for the web interface. Limited data refresh of eight times per day. The previous post - Grafana Labs: Loki – logs collecting and monitoring system. With the help of Grafana's excellent query editor, in their dashboarding product, it's easy to use, easy to learn and very readable. To query any data via Grafana, a Dashboard is required, just create one following the screenshot: Select Dashboards and +New from the Menu Query. Examples include admin/metrics or /select or admin/collections. I get the result of the query and process it. 1{} by {host} to top5(system. There Loki, promtail, and Grafana were configured on the same host in one Docker Compose stack. com)是 OSCHINA. We’ve installed Grafana, and configured it to query InfluxDB. InfluxDB is an open source time series database that provides very good input/output capabilities, and has great disk storage efficiency. You can filter by specific data centers, record types, query types, response codes, and query name, so you can filter down to see analytics for just the MX records that are returning errors in one of the data centers, or understand whether the negative answers are generated because of a DNS attack, or misconfigured records. Grafana Vs Kibana? As I stated earlier. ACCESS TO THE COMPLETE [email protected] BULLETIN. (Here I use Graphite as my 'database of truth' to get idea about running processes and metrics available). We define a query performed in Grafana's native store, and the query filters the annotations by tags. As of August 2016, the HAVING clause is not yet available in InfluxDB so finding all points where sum(one) + sum(two) > 0 is not possible directly in InfluxDB without using a continuous query to create an intermediate series. Set slow_query_log_file to specify the name of the log file. Let's use the query SELECT _event_time, COUNT(*) FROM _events GROUP BY _event_time LIMIT 100; where _event_time is a timeseries field. Grafana is a feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB. A metric filter checks incoming logs and modifies a numeric value when the filter finds a match in the log data. It's not hard to get ASP. For most use cases, we believe that SQL is the right query language for a time-series database. They are currently always interpolated as epoch milliseconds. If you want a 'status table' showing you active Alarms in PRTG, for example, then you need to use the Table panel type in Grafana. If you use Prometheus, then you probably use Grafana. Grafana has a pretty advanced Graphite query editor which enables us to interact with the data with the help of expressions & functions. failure of the sensor / Bluetooth), but for my purposes the priority was reducing the point count to Grafana. The first parameter of $. You can filter by specific data centers, record types, query types, response codes, and query name, so you can filter down to see analytics for just the MX records that are returning errors in one of the data centers, or understand whether the negative answers are generated because of a DNS attack, or misconfigured records. txt) or read online for free. The search field on the Discover page provides a way to query a specific subset Moreover after search it is possible to see the document structure and even filter Grafana's support for. Custom DevOps Monitoring System in MelOn 저장 수집 시각화 Telegraf 현실적인 문제 – 세상이 좋아 졌다 14. To have the additional dashboards, load them from the grafana-dashboards directory. The path to the query endpoint where the request will be sent. Go to Grafana -> Dashboard -> Manage Dashboard -> Templating to create a new variable. Filters can be used to restrict the numbers of users or groups that are permitted to access an application. IoT with InfluxDB, Telegraph and Grafana on the Raspberry Pi 3 Print all metrics that pass through this filter. In our case, this means building an InfluxQL query. There are various ways to learn about the data contained within an InfluxDB system. Notes: When you filter a column, only the top 1,000 distinct values in the column will load into the filter list. Grafana Active Directory LDAP configuration examples. Grafana has richer display features and more options for playing around with how the data is represented within the graphs. With this tutorial, you can learn and understand how to use NoSQLBooster SQL Query for MongoDB. Grafana templating is very useful, when you do not want to spend time on creating similar panels, but your data does not fit nicely on a single one. Grafana Dashboards. Query Filters. tag-key - The key of a tag assigned to the resource. When multi-value was not enabled my query looked like this:. Set the timeline and the refresh time. avg()控制每个系列的值如何减少到可与阈值进行比较的值。. Hello, I'm new with ELK/Grafana. Panel is a basic visualization building block presented per the metrics selected. Regex Use regex if you need to filter values or extract a part of value. Querying by tag will refine the available list of metric names (much like a filter) and can result in multiple metrics from a single query. , a container that exposes TCP ports 100, 101, 102 displays 100-102/tcp in the PORTS column. Download, install and start. Note how we are using a Grafana specific function $__timeFilter here. SSRS report with parameter is simple in T-SQL code. " We have used a filter to specify which documents we want, so they will all be returned with a score of 1. cacheTime - which will cache query replies for specified number of seconds, so if we get the information once and someone does the same query after a few seconds (another user having grafana dashboard opened or even the same one, but with very short auto refresh time) proxy will reply immediately with the same information. It's similar to well-known ELK / EFK stack but more simple to set up and use and is intended to be used mostly with clouds and systems like Prometheus and Kubernetes. The ASP script in "demo_test_post. Issue: Huge spikes in output and negative values shown on grafana at random times from network plugin. Note that the Query Editor will allow you to build more than one Query for the data, thus supporting multiple series for graphs. usage_average is an item in the Grafana query in the VMs dashboard which causes No data points. com/public/qlqub/q15. (Here I use Graphite as my 'database of truth' to get idea about running processes and metrics available). com maintains a collection of shared dashboards which can be downloaded and used with standalone instances of Grafana. Grafana — Visualization. With the help of Grafana’s excellent query editor, in their dashboarding product, it’s easy to use, easy to learn and very readable. If I later decide I don't like Grafana, I can query InfluxDB from something else. For a full description of the query syntax, see Searching Your Data in the Kibana User Guide. Real-time API performance monitoring with ES, Beat, Logstash and Grafana. On the domain controller, open the application named: Active Directory Users and Computers. Select multiple items by single query. 3 query/filter是查询的方式,内部定义了针对嵌套对象的查询,注意内部的查询一定要是用全路径, 比如 user. In this weekly post, we recap the most interesting InfluxDB timestamp and query time range and TICK-stack related questions and answers. Monitoring hosts with CollectD, InfluxDB and Grafana Posted on November 26, 2015 by admin In this article we will install a monitoring solution on CentOS 7 consisting of CollectD , InfluxDB and Grafana. The filter we have specified is a term query, asking for all documents that contain an email field with the value “[email protected] TagDetails (orgId uint32, key string, filter *regexp. Grafana-Zabbix is a plugin for Grafana allowing to visualize monitoring data from Zabbix and create dashboards for analyzing metrics and realtime monitoring. The goal of this project is to investigate different solutions and develop some typical monitoring displays, such as the general IT Department overviews and service-specific dashboards of data provided by the IT groups and stored in the IT monitoring repository. Grafana allows users to create, explore, and share dashboards to query, visualize, and alert on data. A query language for your API. IoT with InfluxDB, Telegraph and Grafana on the Raspberry Pi 3 Print all metrics that pass through this filter. This is a fully functional demo using live data from RouteViews. I have configured Winlogbeat to forward all windows events to ELK. On the top right, click “Add data source”. limit(10) returns 20 lines in this case. In order to filter our data by container name, we will use a concept in Grafana called Templating which makes our Dashboard more interactive and dynamic. You can use filters in the Monitoring API v3 to do the following: Retrieve time series. Grafana allows you to query, visualize, alert on and understand your metrics no matter where they are stored. Below I have created a step by step tutorial on how to stand up a Grafana/InfluxDB instance on an existing Graphite server running CentOS 6. InfluxDB is an open source time series database that provides very good input/output capabilities, and has great disk storage efficiency. Analyzers & the Inverted Index By default Elasticsearch runs data that comes in through a set of analyzers when it comes in. The result of an expression can either be shown as a graph, viewed as tabular data in Prometheus's expression browser, or consumed by external systems via the HTTP API. The ability to select multiple items from a single query; A feature to select between Raw JSON, Metrics or Text property query modes; and; Full support for regular expressions for all query filters; If you'd like to add Grafana support to your PRTG installation, you can get the code and instructions either: from Grafana's plugins site; or. The dashboard includes Situation metrics, MTTA and MTTR, user activity, Situation stats by user, user performance overview and user activity overview. I, professionally, haven't done sysadmin work but since I've been configuring Linux VPSs to play with for some time now I figured it wouldn't be that hard doing the initial setup. Check this video on creating template variables & using in the query for filtering. list() and query Tibco JMX bean + standard beans. Hi, I meet a problem when I try to add more filters in my grafana query for "templating". This is the same API that is used by Grafana's frontend to accomplish such tasks. Spark SQL includes a cost-based optimizer, columnar storage and code generation to make queries fast. As of August 2016, the HAVING clause is not yet available in InfluxDB so finding all points where sum(one) + sum(two) > 0 is not possible directly in InfluxDB without using a continuous query to create an intermediate series. Enter admin as both username and password, as illustrated below: The Grafana Home Dashboard displays. IoT with InfluxDB, Telegraph and Grafana on the Raspberry Pi 3 Print all metrics that pass through this filter. Reporting support package. I just want the only the rows with "john" Hope I am clear. A critical function of any database system is to enable fetching subsets of the full data set using some form of filtering. I used something similar to omit irrellavent disk drives from the query. Solr DisMax and eDisMax query parsers can add phrase proximity matches to a user query. There Loki, promtail, and Grafana were configured on the same host in one Docker Compose stack. Is the above a valid query, shouldn't there be some values in the 'Query' box, if so why not an example. To reference a metric name in the filter, use the __name__ attribute. ifHCInOctets is the value/reading that we have, and we're using the WHERE clause to filter it to a specific interface on the router. The result of an expression can either be shown as a graph, viewed as tabular data in Prometheus's expression browser, or consumed by external systems via the HTTP API. Use the plus and minus icons to the right to add/remove metrics or group by clauses. SHOW TAG VALUES WITH KEY = “host” - which will show you all the hosts in the datasource. Sample Grafana dashboard JSON code Product Bolt Open Source Puppet Puppet Enterprise Continuous Delivery for Puppet Enterprise Puppet Remediate Puppet Discovery Pipelines for Applications Pipelines for Containers PuppetDB Puppet Development Kit Puppet Plug-in for VMware vRealize Automation Puppet License Manager Container Registry. 0 was still in Beta on Feb 2019, when the new feature was introduced - Loki, a log aggregation system available via another new ability - Explore. PromQL is the query language designed for Prometheus. This is the part where you can get creative ;). Grafana integrates with Prometheus allowing queries to be visualized in many different graph formats. Although Lucene provides the ability to create your own queries through its API, it also provides a rich query language through the Query Parser, a lexer which interprets a string into a Lucene Query using JavaCC. Grafana will take the results of the query and provide visualizations of the resulting metrics. Having all that in place, we can visualize any data available in the agg_hour database. Grafana sends a query to our / query endpoint. Grafana comes with a number of functions like this. Download, install and start. Hi, I meet a problem when I try to add more filters in my grafana query for "templating". As indicated, a TSDB query requires that you set the filter and/or fields parameter. However, you should use raw query mode and reference the PRTG api directly. Percona delivers enterprise-class software, support, consulting and managed services for both MySQL and MongoDB across traditional and cloud-based platforms. 10 hours ago · We’ve thus received positive responses from engineers and operators regarding the functionality of InfluxQL, InfluxDB’s query language, in an industrial context. Now that all is setup and data is incoming, connect Grafana to InfluxDB by adding a new InfluxDB datasource. Set up Grafana on Azure through the Azure Marketplace. You'll find comprehensive guides and documentation to help you start working with LightStep [𝑥]PM as quickly as possible, as well as support if you get stuck. A log query consists of two parts: a log stream selector, and a filter expression. BW HTTP Receiver is triggered by Prometheus. You can use metric filters to extract values from JSON log events. Using ElasticSearch and Grafana, I have build the above dashboard to monitor IIS and Apache websites. It can run on-premises on all major operating systems or be hosted by Grafana Labs via GrafanaCloud. For table queries, the filter is applied to the names of item attributes (table columns). The Prometheus data source built into Grafana allows metrics to be aggregated as well as broken into series. Now click the Options tab. 对于elasticsearch nested就说这么多了…. The solution is clear, let’s use filters!. Save the dashboard. Note: The port number can be configured in the docker-compose. To reference a metric name in the filter, use the __name__ attribute. All of the worldPing dashboards uses variables so if you want to make use of Grafana’s alerting feature you’ll need to configure the query you want to use for alerting to use specific filters. It may be helpful for you to create a custom dashboard that is specific to your application. Although Lucene provides the ability to create your own queries through its API, it also provides a rich query language through the Query Parser, a lexer which interprets a string into a Lucene Query using JavaCC. When I select a service how can I make it filter the second template variable list based on the first?. It's not hard to get ASP. Grafana also allows you to personalize dashboards for different users. In the second query add Oracle_BI_General. One key visible difference between the different time series databases is how queries are constructed in Grafana, and creating the content for the legend. 10 hours ago · We’ve thus received positive responses from engineers and operators regarding the functionality of InfluxQL, InfluxDB’s query language, in an industrial context. Presto is an open source distributed SQL query engine for running interactive analytic queries against data sources of all sizes ranging from gigabytes to petabytes. We’ve installed Grafana, and configured it to query InfluxDB. I recently started working at a startup :). For more information on the InfluxDB query language, see here. Tom is VP Product at Grafana Labs, but really he is a software engineer. Grafana offers a platform on grafana. Regex filters for items and hosts. Grafana is an open-source visualization tool that can be used on top of a variety of different time series data sources, including Prometheus. Alertmanager and Grafana configuration. x86_64 grafana-4. Its been used quite a bit at the Open Knowledge Foundation over the last few years. This is the query needed in Grafana to display that data, so the upper left Single Stat panel showing the WAN inbound. For the first query the 'Template Variable' on Grafana dashboard could be specified as follows: For the second query the tag_values in the 'Template Variable' need to be filtered by the additional filter 'gpfs_fs_name=fs1':. ifHCInOctets is the value/reading that we have, and we're using the WHERE clause to filter it to a specific interface on the router. 0 was still in Beta on Feb 2019, when the new feature was introduced - Loki, a log aggregation system available via another new ability - Explore. This query is used as a "trick to the Spark engine" to force a full read of the table and intentionally avoiding optimization, like Parquet filter pushdown. With reviews, features, pros & cons of Grafana. For timeseries queries, the filter is applied to the names of of labels and/or metrics. To make the most out of Grafana, you must put your dashboards and configuration in. Grafana also contains a powerful query editor that allows you to filter data using patterns to ensure only the proper data is illustrated. Use Grafana and Zabbix to create a custom dashboard that displays data about your servers. Kibana: The Key Differences to Know - Logz. Report Scheduling will be added when Microsoft. Collecting and visualizing metrics with statsd, InfluxDB and Grafana on Fedora 22 InfluxDB and Grafana. To have the additional dashboards, load them from the grafana-dashboards directory. Grafana offers a platform on grafana. The ability to display a KPI or Scorecard based on the latest values available is essential for real time reporting - consider a real time data snaphot sent as a row to a datatable using the REST API. 1- Create Container Filter. Additionally, you can extract labels from prometheus with the label_values function, which takes a label name and an optional metrics name parameter. Manual installation steps are detailed further below. Templating. The path to the query endpoint where the request will be sent. Multi-value Enable, if you want to select multiple values at the same time. You can use metric filters to extract values from JSON log events. Verified account Protected Tweets @ Suggested users Verified account Protected Tweets @. OpenTSDB was designed to efficiently combine multiple, distinct time series during query execution. This easy-to-use Query Editor allows you to build queries based on the data source for your panel. For timeseries queries, the filter is applied to the names of of labels and/or metrics. These will vary depending on the request type and the endpoint. Let’s try and understand what’s happening here and how Grafana variables work. You can easily build your chart without knowing InfluxDB SQL-Like syntax. I want to use these graphs because they are well made and saves me time but I have to recreate graphs for things I want to alert for. Create a new account inside the Users container. Report Scheduling will be added when Microsoft. For an introduction to metrics, time series, and monitored resources, see Metrics, Time Series, and Resources. For example, to find all resources that have a tag with the key Owner and the value TeamA, specify tag:Owner for the filter name and TeamA for the filter value. Template variable query in Zabbix data source is a string which contains 4 parts wrapped in braces ({}). Label filters support four operators: = equal!= not. If a log file already is open, it is closed and the new file is opened. Creating a dashboard from scratch. Grafana integrates with Prometheus allowing queries to be visualized in many different graph formats. There are other settings in the adjacent Grafana gauge panel to limit this to the instant or latest value, but the query actually returns the series of instant values, which are displayed as a yellow line in the graph. A critical function of any database system is to enable fetching subsets of the full data set using some form of filtering. The Grafana system allows you to define a "template variable" that can allow the end user to select custom values for changing the dashboard on the fly. There are various ways to learn about the data contained within an InfluxDB system. I hoped that the GUI would be querying data source and offering valid entries for each field (as the Youtube video using Graphite seems to do) but no luck. Once the query has been prepared, Grafana then gives you the ability to make it look nice…very nice. It’s not hard to get ASP. The Grafana API allows developers to interact with a feature-rich metrics dashboard and graph editor for Graphite, InfluxDB, and OpenTSDB. You can also set up a template variable in grafana and use something like. FieldsCSV is a list of columns to display in the table. Fun with ElasticSearch’s children and nested documents. Grafana templating is very useful, when you do not want to spend time on creating similar panels, but your data does not fit nicely on a single one. Querying by tag will refine the available list of metric names (much like a filter) and can result in multiple metrics from a single query. 警报仅在Grafana v4. TL;DR Flux is powerful You can start playing with Flux in Grafana today Flux support in Grafana is available via a new datasource. In terms of layout, graphs in Grafana are similar to graphs in PRTG. Once installed, the Timely App must be enabled in Grafana. Instead of Telegraf we built our own small data collector between ASP. In addition to its powerful visualisations, Grafana is not tied to a particular stack or vendor, and supports multiple backend data sources including InfluxDB, Graphite. This document demonstrates Step 3. The whole Chronix Stack is open source and free to use for everyone without any restrictions. Filters are not used in the calculation of scores, so the match_all query gives all documents a score of 1. Also to present the list of queries - i have to "play" with Chrome visibility from 100% to 90% (for example). Install the Grafana plug-in to convert real-time query SQL into views. Grafana is an open source, feature rich metrics dashboard and graph editor for Graphite, Elasticsearch, OpenTSDB, Prometheus and InfluxDB. For Environment choose local. Examples include admin/metrics or /select or admin/collections. In the third part of this tutorial series we will create Query Variables and Annotations for our three Dashboards (Testing, Support, Pipeline). It's not hard to get ASP. Additionally, you can extract labels from prometheus with the label_values function, which takes a label name and an optional metrics name parameter. If you continue to use this site, you agree to the use of cookies. LDAP integration is enabled via the 'grafana. Easy Powerful Beuatiful InfluxDB (저장) +Telegraf(수집) + Grafana (시각화) 16. list() and query Tibco JMX bean + standard beans. use Grafana, it has a datasource ready to query on Prometheus. asp" reads the parameters, processes them, and returns a result. What the query does is reading the entire table, applying the given filter and finally returning an empty result set. Now everything is in place. Remember, DN is case sensitive, this is very important. 10 hours ago · We’ve thus received positive responses from engineers and operators regarding the functionality of InfluxQL, InfluxDB’s query language, in an industrial context. A Grafana dashboard. Click the Add Parameter button to add the customer parameters. Set slow_query_log to 0 to disable the log or to 1 to enable it. It should be mentioned that there is a tutorial on NoSQLBooster SQL Query for MongoDB in the lower left “Samples” pane. Hello, I’m new with ELK/Grafana. InfluxDB is a fast time-series database optimized for massive writes of events and metrics data. Elasticsearch supports the use of aliases. Tom is a maintainer on the Prometheus project and a maintainer and the original author of Cortex, both CNCF projects. By default you can use Kibana's standard query language which features autocomplete and a simple, easy to use syntax. I have a variable "customer" in my grafana dashboard. With the Hawkular Datasource Plugin, the variables of type 'Query' are mapped to the @get (url)/metrics Hawkular Metrics endpoint and can be used to. The principles are similar, but the query editor varies slightly depending on the datasource, and the way in which tags are exposed. 0开始,当运行多个服务器时,警报通知会快速去除重复的。. Suppose we need to search the document with word “Amit”, then our JSON object should be: {. 23 Useful Elasticsearch Example Queries Don't forget to bookmark this article for quick reference when you need it! When using a bool query, you can use a filter clause to filter down the. Remove; In this conversation. On the top right, click “Add data source”. We use a math(*8) to take the data from bits to bytes. Therefore we won't hard-code the name of the container in the metric query but instead we will use a variable. The dashboard includes Situation metrics, MTTA and MTTR, user activity, Situation stats by user, user performance overview and user activity overview. Range searches. Time series storage is not part of its core functionality. Thus, we can later provide interactive dashboards (instead of static ones). Restart the grafana server so it can discover the new plugin. Grafana Active Directory LDAP configuration examples. By default you can use Kibana's standard query language which features autocomplete and a simple, easy to use syntax. About Grafana-Zabbix plugin. I recently started working at a startup :). For timeseries queries, the filter is applied to the names of of labels and/or metrics. Installation. Tom is a maintainer on the Prometheus project and a maintainer and the original author of Cortex, both CNCF projects. Install the Grafana plug-in to convert real-time query SQL into views. Grafana variables. My first task there was to configure their new Linux server to host some live apps. To use the plugin's Azure Monitor integration, install Grafana version 5. This options is required when the ds_type is influxdb,. For timeseries queries, the filter is applied to the names of of labels and/or metrics. Grafana is an awesome dashboard a html page to edit the filters and parameters for the data we want. These will vary depending on the request type and the endpoint. Create a new resource group. If you add new things to PRTG, then you might need to refresh the Grafana page completely before those things show up in Grafana. Fun with ElasticSearch’s children and nested documents. 3 or higher. Sample Grafana dashboard JSON code Product Bolt Open Source Puppet Puppet Enterprise Continuous Delivery for Puppet Enterprise Puppet Remediate Puppet Discovery Pipelines for Applications Pipelines for Containers PuppetDB Puppet Development Kit Puppet Plug-in for VMware vRealize Automation Puppet License Manager Container Registry. K8s and NGINX Plus 5 • Easy to query, filter and extract • Scrapes data from instances • Aggregate multiple sources of data. smb2" to also graph the active SMB clients against the SMB ops and CPU. This package provide files for the web interface. It's similar to well-known ELK / EFK stack but more simple to set up and use and is intended to be used mostly with clouds and systems like Prometheus and Kubernetes. 对于elasticsearch nested就说这么多了…. select message from logs The output of the above query is - “This is a test data created by john” “This is a test data created by admin” But I need to filter the query results here. Read more now and check back next week for more tech tips, workarounds, how-tos and Q&A from GitHub, IRC and the InfluxDB community!. Like Kibana, Grafana allows you to narrow down the content of the dashboards with variables, a pre-set list of values you can use to filter the output of the visualizations. Now, in order to browse logs, we use any one of a few basic queries. 对于elasticsearch nested就说这么多了…. What is quasardb? 1. Create a new resource group. DeleteTagged (orgId uint32, query tagquery. Grafana is most commonly used for visualizing time series data for Internet infrastructure and application analytics but many use it in other domains including industrial sensors, home automation, weather, and process control. Start a Docker container with Grafana. An attacker can therefore trigger a Cross Site Scripting via Query Editor of Grafana, in order to run JavaScript code in the context of the web site. http://grafana. Further, for workloads that failover applications between regions or workloads sharded across regions, the single global view makes it much easier to sum and query metrics across all regions in a single query. Grafana alert doesn’t support templated variables. 本文介绍了 Grafana 相对高级的一些使用技巧,除了可以看到 Grafana 的强大功能以外,也应该注意到 Grafana 只是一个时序性很强的统计监控平台,一些非时序性质的功能例如报错的聚合和报错的日志等应该交给更专业的去做,例如 sentry 和 ELK。. avg()控制每个系列的值如何减少到可与阈值进行比较的值。.