Java's new Z Garbage Collector (ZGC) is very exciting
Java 11 has recently been feature frozen and contains some really great features, one in particular we’d like to highlight. The release contains a brand new Garbage Collector, ZGC, which is being developed by Oracle that promises very low pause times on multi-terabyte heaps. In this article we’ll cover the motivation for a new GC, a technical overview and some of the really exciting possibilities
Data Center
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Java GC, HotSpot's CMS and heap fragmentation
Concurrent Mark Sweep (CMS) is one of garbage collection algorithms implemented in HotSpot JVM. CMS is designed to be mostly concurrent, requiring just two quick stop-the-world pauses per old space garbage collection cycle. But if CMS cannot keep up with allocation of memory by application, it may fallback to stop-the-world whole heap collection - infamous Full GC pause. Full GC is very noticeable
Cassandra and Solid State Drives
This document discusses how Cassandra's storage engine was optimized for spinning disks but remains well-suited for solid state drives. It describes how Cassandra uses LSM trees with sequential, append-only writes to disks, avoiding the random read/write patterns that cause issues for SSDs like write amplification and reduced lifetime from excessive garbage collection. While SSDs have benefits lik
Dealing with JVM limitations in Apache Cassandra (Fosdem 2012)
The document discusses dealing with JVM limitations in Apache Cassandra. It identifies key pain points like garbage collection and platform-specific code. It then explores specific issues like fragmentation and offers solutions like arena allocation for memtables. The document also advocates for allowing more low-level access in Java to directly address issues like file mapping limitations, in ord
Cloudera Blog
Enterprises see embracing AI as a strategic imperative that will enable them to stay relevant in increasingly competitive markets. However, it remains difficult to quickly build these capabilities given the challenges with finding readily available talent and resources to get started rapidly on the AI journey. Cloudera recently signed a strategic collaboration agreement with Amazon […] Read blog p
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Grid Dynamics Blog
https://blogs.oracle.com/jonthecollector/did-you-know
https://blogs.oracle.com/dave/false-sharing-induced-by-card-table-marking
https://blogs.oracle.com/jonthecollector/our-collectors
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