ZGC supports heap sizes from 8 MB up to 16 TB. The Z Garbage Collector, or ZGC, promises not to exceed pause times of 10 ms while reducing overall application throughput by no more than 15% compared to the G1GC (the reduction in throughput is the cost of low latency). ZGC: A Scalable Low-Latency Garbage Collector With memory requirements ranging from gigabytes to terabytes, they may have to achieve response times in the single-digit millisecond range.Ĭonventional garbage collectors (such as the allrounder G1) with stop-the-world phases of a hundred milliseconds and more are not optimally suited to such requirements.Īiming to eliminate stop-the-world pauses as much as possible (by doing most of the work in parallel with the running application), or at least reduce them to a few milliseconds, Oracle and RedHat have developed two new garbage collectors that have been shipped as preview features since Java 11 and 12, respectively.Īs of Java 15, they are ready for productive use and will hopefully make the Java platform attractive to even more developers. ![]() The requirements for modern applications are becoming increasingly demanding. Due to positive feedback, Text Blocks were released as a production-ready feature in Java 15 by JDK Enhancement Proposal 378 without further changes.) New Garbage Collectors: ZGC + Shenandoah In the second preview in Java 14, two new escape sequences were added. They were a replacement for JEP 326, "Raw String Literals", which was not accepted by the community and subsequently withdrawn. ![]() (Text Blocks were first introduced as a preview feature in Java 13. Learn how exactly to write and format text blocks, which escape sequences we don't need anymore … and which ones we have available instead, in the main article "Java Text Blocks". ORDER BY title" "" Code language: Java ( java ) Starting with Java 15, we can notate this string as a "text block": String sql = "" " + "ORDER BY title" Code language: Java ( java ) Until now, when we wanted to define a multi-line string in Java, it usually looked like this: String sql =
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