Oracle SQL - CEP语法梳理
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Apache Flink CEP
实时处理中自然少不了CEP这个重量级功能。其实已经有不少成熟的框架实现了CEP，如Github siddhi和EsperTech，但他们使用了特有的语法来做到开发者的友好交互。那么，把CEP的功能加入到万能的SQL中，是不是很有意思呢？
hs_err_pid.log - 详解
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JVM
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 12288 bytes for committing reserved memory.
# Possible reasons:
# The system is out of physical RAM or swap space
# In 32 bit mode, the process size limit was hit
# Possible solutions:
# Reduce memory load on the system
# Increase physical memory or swap space
# Check if swap backing store is full
# Use 64 bit Java on a 64 bit OS
# Decrease Java heap size (-Xmx/-Xms)
# Decrease number of Java threads
# Decrease Java thread stack sizes (-Xss)
# Set larger code cache with -XX:ReservedCodeCacheSize=
# This output file may be truncated or incomplete.
#
# Out of Memory Error (os_linux.cpp:2673), pid=13016, tid=140682742126336
#
# JRE version: Java(TM) SE Runtime Environment (8.0_40-b25) (build 1.8.0_40-b25)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.40-b25 mixed mode linux-amd64 compressed oops)
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java againAerospike(1) - Introduction
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分类于
Aerospike
本文描述了Aerospike的应用场景,数据模型,索引等基本原理,并基于Aerospike的优缺点做出了选型建议