If you have 10,000 front-end users, having a connection pool of 10,000 would be shear insanity. 1000 still horrible. Even 100 connections, overkill. You want a small pool of a few dozen connections at most, and you want the rest of the application threads blocked on the pool awaiting connections.
imagine three threads (Tn=3), each of which requires four connections to perform some task (Cm=4). The pool size required to ensure that deadlock is never possible is:
pool size = 3 x (4 - 1) + 1 = 10
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Autojar dient dazu, jar-Archive minimaler Größe aus unterschiedlichen Qellen (eigenen Klassen, Verzeichnissen, Archiven) zu erzeugen. Ausgehend von einer oder mehreren Klassen wird der Bytecode rekursiv nach weiteren benutzten Klassen durchsucht; diese werden ggf. aus ihrem Archiv extrahiert und in die Ausgabedatei übernommen. Das resultierende Archiv enthält alle tatsächlich benutzten Klassen, und nur diese. Somit lassen sich z.B. Größe und Ladezeit von Applets klein halten oder Applikationen unabhängig von installierten Bibliotheken machen.
@article{ciancaleoni2007cdn, title={{Combining Diffusion NMR and Conductometric Measurements to Evaluate the Hydrodynamic Volume of Ions and Ion Pairs}}, author={Ciancaleoni, G. and Zuccaccia, C. and Zuccaccia, D. and Macchioni, A.}, journal={Organometallics}, volume={26}, number={15}, pages={3624--3626}, year={2007} }
Earth allows you to find files across a large network of machines and track disk usage in real time. It consists of a daemon that indexes filesystems in real time and reports all the changes back to a central database. This can then be queried through a simple, yet powerful, web interface. Think of it like Spotlight or Beagle but operating system independent with a central database for multiple machines with a web application that allows novel ways of exploring your data.
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Click on the desktop. Press and hold the CTRL key. Use your mouse wheel to scroll up and down and change the icon size. Another way to do this is just right click on the desktop, choose 'View' and select 'Classic Icons'
Over the years many Java developers have asked, "How much memory
does a Java object consume?" In this Java Tip,
Vladimir Roubtsov explains problems with previous solutions. In
addition, based on his experience exploring memory usage, he offers
a few tips on working around some Java inefficiencies.
<pageSet> <page> <text x="5%" y="10%" font-family="Arial" font-size="12"> I scale to the page, but leave an empty 10% margin for comments. </text> </page> </pageSet>
@Repository
public interface PostRepository extends BaseJpaRepository<Post, Long> {
@Query("""
select p
from Post p
where date(p.createdOn) >= :sinceDate
"""
)
@QueryHints(
@QueryHint(name = AvailableHints.HINT_FETCH_SIZE, value = "25")
)
Stream<Post> streamByCreatedOnSince(@Param("sinceDate") LocalDate sinceDate);
}
The FETCH_SIZE JPA query hint is necessary for PostgreSQL and MySQL to instruct the JDBC Driver to prefetch at most 25 records. Otherwise, the PostgreSQL and MySQL JDBC Drivers would prefetch all the query results prior to traversing the underlying ResultSet.
Twice today that question was put to me. I thought I’d take a moment and answer it not just for the two individuals who asked, but for anyone who might be wondering. Below is my recommendation…
Elements that have a set width become wider when they have padding and/or border-width. To avoid these problems, make use of the now common box-sizing: border-box; reset.
E. Crane, and N. McPhee. Genetic Programming Theory and Practice III, volume 9 of Genetic Programming, chapter 15, Springer, Ann Arbor, (12-14 May 2005)