lidaling

public boolean forward(HttpServletRequest request, HttpServletResponse response , String serviceName) throws IOException {
        String[] serviceNames = forwardname.split(";");
            
            String requestURI = request.getRequestURI();//获取请求URI
            String queryParam=request.getQueryString();//获取请求url中的参数
            String url=  targetUrl + requestURI;
            if(StringUtils.isNoneBlank(queryParam)) {
                url = url + "?" + queryParam;
            }
            logger.info(serviceName + "=================== forward to " + url  );

lidaling

@RestController
@RequestMapping(GraphDBController.DELEGATE_PREFIX)
@Api(value = "GraphDB", tags = {
        "graphdb-Api"
})
public class GraphDBController {

    @Autowired
    GraphProperties graphProperties;

lidaling

import org.springframework.http.*;
import org.springframework.stereotype.Service;
import org.springframework.util.MultiValueMap;
import org.springframework.util.StreamUtils;
import org.springframework.web.client.RestTemplate;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;

lidaling

目的

• 了解JAVA程序性能调优的过程、原理以及常见方法；在这方面做到“知道自己不知道”；
• 不用了解太多细节，这些细节的学习需要结合大量实践，只能有机会再深入。

---

TODO/疑问

• 为什么优化GC时，要按照“确定内存需求" -> "延迟调优" -> "吞吐量调优"的顺序？ 是因为这些指标之间存在该顺序表明的依赖关系？
• 如何定义性能需求？

lidaling

#!/bin/bash

# A script to set up a new mac. Uses bash, homebrew, etc.

# Focused for ruby/rails development. Includes many utilities and apps:
# - homebrew, rvm, node
# - quicklook plugins, terminal fonts
# - browsers: chrome, firefox
# - dev: iterm2, sublime text, postgres, chrome devtools, etc.
# - team: slack, dropbox, google drive, skype, etc

lidaling

-- show running queries (pre 9.2)
SELECT procpid, age(query_start, clock_timestamp()), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(query_start, clock_timestamp()), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

lidaling

Occasionally we will deploy a virtual instance into our KVM infrastructure and realize after the fact that we need more local disk space available. This is the process we use to expand the disk image. This process assumes the following:

• You're using legacy disk partitions. The process for LVM is similar and I will describe that in another post.
• The partition you need to resize is the last partition on the disk.

This process will work with either a qcow2 or raw disk image. For

lidaling

package samples

import org.junit.runner.RunWith
import org.scalatest.junit.JUnitRunner
import org.scalatest._
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.context.annotation._
import org.springframework.stereotype.Service
import org.springframework.test.context.support.AnnotationConfigContextLoader
import org.springframework.test.context.{ActiveProfiles, ContextConfiguration, TestContextManager}

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object Application  {
  def main(args: Array[String]) : Unit = SpringApplication.run(classOf[ApplicationConfig], args :_ *)
}

lidaling

#!/bin/bash
# Perform installation as root
# Install prereqs

yum -y install libcurl libcurl-devel rrdtool rrdtool-devel rrdtool-prel libgcrypt-devel gcc make gcc-c++

# Get Collectd, untar it, make it and install

wget http://collectd.org/files/collectd-5.4.0.tar.gz
tar zxvf collectd-5.4.0.tar.gz