8 messages in com.mysql.lists.javaRe: SQLException: Communication link ...| From | Sent On | Attachments |
|---|---|---|
| Jan Pfeifer | 28 Nov 2003 14:43 | |
| Christopher Taylor | 28 Nov 2003 17:42 | |
| Jan Pfeifer | 29 Nov 2003 03:48 | .java |
| Mark Matthews | 29 Nov 2003 06:29 | |
| Jan Pfeifer | 29 Nov 2003 07:45 | |
| Mark Matthews | 29 Nov 2003 09:00 | |
| Jan Pfeifer | 30 Nov 2003 07:45 | .java, .sh |
| Jan Pfeifer | 01 Dec 2003 04:28 | .java |
| Subject: | Re: SQLException: Communication link failure![]() |
|---|---|
| From: | Jan Pfeifer (pfj...@yahoo.com.br) |
| Date: | 12/01/2003 04:28:03 AM |
| List: | com.mysql.lists.java |
| Attachments: | ![]() Teste.java - 1k |
hi Celil, first of all thanks for the answer :)
strangely enough your solution has so far (I ran it a couple of times) avoided the timeouts. But still runs slugguish, leaving the CPU mostly idle while running.
i'm testing now in an old machine, a Debian stable where the jdbc seems to be working, so i increased the loop count to 100 and run the Test.java you sent (*) and timed it:
PII 333Mhz/128Mb mem/Debian Stable, MySql 3.23.49, Java 1.4.2_01, J/Connector 3.0.8: (hundred times reading a 8600 record table of (name varchar(20) primary key) filled with random names):
$ time java Teste ... real 0m21.932s user 0m12.770s sys 0m0.250s
on Athlon XP2100/512Mb/Debian Unstable, MySql 4.0.16, Java 1.4.2_02, J/Connector 3.0.9 (though i've tried other Java versions, J/Connector 3.0.8, and also kernels 2.4 and 2.6)
$ time java Teste ... real 1m54.383s ---> CPU idle most of the time ... user 0m2.522s sys 0m0.067s
i'm sending attached the Teste.java file and half (it didn't fit all) of the "player" table i'm reading as a test.
thanks again,
jan
ps.: (*) notice that from the Teste.java file you've sent i commented out reading/printing the fields. Btw., the idea of the test.sh file i sent was just to compare the speed of doing the same queries through the command line interface.
Celil Germeyan wrote:
I am attaching Teste.java and teste.sh files which work. I tested them. Please read the comments in the files.
Hope helps, cg





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