Jochem, ----- Original Message ----- From: "Jochem van Dieten" <[EMAIL PROTECTED]> Newsgroups: mailing.database.myodbc Sent: Saturday, February 21, 2004 2:10 AM Subject: Re: InnoDB Hot Backup + MySQL embedded?
> Sasha Pachev wrote: > > Heikki Tuuri wrote: > >> C versus object-oriented lanuguages like C++/Java is a topic I have > >> discussed a lot with programmers. I believe that traditional procedural > >> approaches and languages, like C, are the best for 'systems programming', by > >> which I mean implementing anything with complex data structures and lots of > >> parallelism. A DBMS is a typical example of such a complex program. > > >> 3) A weakness of C compared to Java is memory management. In C you can > >> easily write programs that leak memory or run over allocated buffers. In > >> practice, it has turned out to be relatively easy to keep these memory > >> management bugs at a tolerable level in our C programs, so that a move to a > >> language with automatic memory management is not needed. > > > > In Java is it easy to write a program that wastes large amounts of > > memory, which is worse than a leak. In C, you are full from the start, > > and then you leak a drop at a time until you are empty. In Java , you > > are empty from the start, and you have nothing to leak anyway even if > > you could :-) > > http://citeseer.nj.nec.com/shah01java.html here is a .pdf version of the paper: http://gist.cs.berkeley.edu/~mashah/java-paper/paper.pdf The authors used a 2 x Pentium III 667 MHz, Linux-2.2.16, Sun JDK 1.3, and Java HotSpot Server JVM 1.3.0. to implement a 'data-flow' query processor. Their conclusion is that the memory management and the garbage collection of Java is inefficient. The graph that they present shows an up to 2.5-fold performance degradation with the Java garbage collector, compared to their own tailored memory management system. I worked with Entity Systems Oy in the 1980s. We developed a Lisp interpreter and a compiler, and a Prolog interpreter. At that time, the inefficiency of the garbage collection in Lisp and Prolog was a serious problem. I am not familiar with more modern garbage collection algorithms, but the paper of Shah et al. suggests that there are still problems today. In the 1980s, the research group of Mike Stonebraker initially started implementing Postgres in a mixture of Lisp and C, but they later abandoned Lisp. > Jochem Regards, Heikki > -- > I don't get it > immigrants don't work > and steal our jobs > - Loesje -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
