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JavaVMã®çŠ¶æ³ã‚’簡易出力ã™ã‚‹jstat Javaã«ã¯ã€ã‚°ãƒ©ãƒ•ã‚£ã‚«ãƒ«ãªãƒ•ãƒ©ãƒ•ã‚’出力ã™ã‚‹ç’°å¢ƒã‚„リソースãŒãªã„å ´åˆã‚’想定ã—ãŸãƒ„ールも用æ„ã•ã‚Œã¦ã„ã¾ã™ã€‚jstat（Java 1.4以å‰ã¯jvmstat）ã¨å‘¼ã°ã‚Œã‚‹ãƒ„ールã§ã™ã€‚使ã„æ–¹ã¯ç°¡å˜ã§ã™ã€‚ jstat -出力オプション（-h[ヘッダーを出力ã™ã‚‹è¡Œé–“éš”]） [プãƒã‚»ã‚¹ç•ªå·] [出力間隔（ミリ秒）] [注] 出力オプションã«ã¤ã„ã¦ã¯[Java 仮想マシン統計データ監視ツール]ã‚’å‚考ã«ã—ã¦ãã ã•ã„。 例ãˆã°ã€ C:\>jstat -gcutil -h5 6684 1000 を入力ã™ã‚‹ã¨ã€æ¬¡ã®ã‚ˆã†ã«å‡ºåŠ›ã•ã‚Œã¾ã™ã€‚ 出力オプション: gcutilã§æŒ‡å®šã•ã‚ŒãŸãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆã§ã€ãƒ˜ãƒƒãƒ€ãƒ¼ã‚’5行間隔ã€1秒間隔ã§å‡ºåŠ›ã—ã¾ã™ã€‚ S0 S1 E O P YGC YGCT FGC FGCT GCT 87.58 0.00 74.95 69.37 99.47 302 0
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2. © 2017 IBM Corporation2 Troubleshooting Spark 2.x §  Building Spark §  Running Spark -  ‘--verbose’ -  Missing external JARs -  OOM on Spark driver -  OOM on executors -  GC policies -  Spark Thrift Server for JDBC apps -  HDFS block distribution -  HDFS blocksize vs Parquet blocksize §  Profiling Spark -  Collecting thread & heap dumps in-flight -  Collecting core dumps after jobs fail 3. © 20
DTrace for Linux 2016
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Battle ready Nginx - an optimization guide – Blogzor
A guide to optimizing Nginx for maximum performanceMost setup guides for Nginx tell you the basics - apt-get a package, modify a few lines here and there, and you’ve got a web server! And, in most cases, a vanilla nginx install will work just fine for serving your website. However, if you’re REALLY trying to squeeze performance out of nginx, you’ll have to go a few steps further. In this guide, I’
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