2015-07-06から1日間の記事一覧
Serial direct path reads were first introduced in Oracle 11G which were noticed by many customers (in both positive and negative ways) who upgraded from the earlier releases. Back then I did a quick write up on the subject to try and tackl…
Linuxでddで1GBのファイルを作成し perf でプロファイリングし、Flame Graph (炎のグラフ?)にして可視化したものです。 Flame Graphs は perf(Linux)、SystemTap(Linux)、DTrace(Solaris、Oracle Linux(UEK)、Mac OS X、FreeBSD)、XPerf.exe(Windows) など…