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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-3655) Metrics for PQS
Date Mon, 01 May 2017 14:47:05 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-3655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15990895#comment-15990895
] 

ASF GitHub Bot commented on PHOENIX-3655:
-----------------------------------------

Github user joshelser commented on a diff in the pull request:

    https://github.com/apache/phoenix/pull/242#discussion_r114133655
  
    --- Diff: phoenix-queryserver/src/main/java/org/apache/phoenix/queryserver/metrics/sink/PqsFileSink.java
---
    @@ -0,0 +1,66 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one
    + * or more contributor license agreements.  See the NOTICE file
    + * distributed with this work for additional information
    + * regarding copyright ownership.  The ASF licenses this file
    + * to you under the Apache License, Version 2.0 (the
    + * "License"); you may not use this file except in compliance
    + * with the License.  You may obtain a copy of the License at
    + *
    + * http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +
    +package org.apache.phoenix.queryserver.metrics.sink;
    +
    +
    +import org.apache.phoenix.queryserver.metrics.PqsConfiguration;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import java.io.File;
    +import java.io.FileNotFoundException;
    +import java.io.UnsupportedEncodingException;
    +import java.io.FileOutputStream;
    +import java.io.PrintStream;
    +
    +
    +public class PqsFileSink extends PqsSink {
    +
    +    private PrintStream writer;
    +    private static final Logger LOG = LoggerFactory.getLogger(PqsFileSink.class);
    +    private String filename = PqsConfiguration.getFileSinkFilename();
    +
    +    public PqsFileSink() {
    +        try {
    +            writer = filename == null ? System.out
    +                    : new PrintStream(new FileOutputStream(new File(filename)),
    +                    true, "UTF-8");
    +        } catch (FileNotFoundException e) {
    +            LOG.error("Error creating "+ filename, e);
    +        } catch (UnsupportedEncodingException e) {
    +            LOG.error("Error creating "+ filename, e);
    +        }
    +    }
    +
    +    @Override
    +    public void close()  {
    +        writer.close();
    +    }
    +
    +
    +    @Override
    +    public void writeJson(String json){
    +        if (json != null)
    +        {
    +            writer.print(json);
    +        }
    +        writer.println();
    --- End diff --
    
    Why print an empty line on every invocation?


> Metrics for PQS
> ---------------
>
>                 Key: PHOENIX-3655
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-3655
>             Project: Phoenix
>          Issue Type: New Feature
>    Affects Versions: 4.8.0
>         Environment: Linux 3.13.0-107-generic kernel, v4.9.0-HBase-0.98
>            Reporter: Rahul Shrivastava
>            Assignee: Rahul Shrivastava
>             Fix For: 4.9.0
>
>         Attachments: MetricsforPhoenixQueryServerPQS.pdf
>
>   Original Estimate: 240h
>  Remaining Estimate: 240h
>
> Phoenix Query Server runs a separate process compared to its thin client. Metrics collection
is currently done by PhoenixRuntime.java i.e. at Phoenix driver level. We need the following
> 1. For every jdbc statement/prepared statement/ run by PQS , we need capability to collect
metrics at PQS level and push the data to external sink i.e. file, JMX , other external custom
sources. 
> 2. Besides this global metrics could be periodically collected and pushed to the sink.

> 2. PQS can be configured to turn on metrics collection and type of collect ( runtime
or global) via hbase-site.xml
> 3. Sink could be configured via an interface in hbase-site.xml. 
> All metrics definition https://phoenix.apache.org/metrics.html



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