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Old June 23rd, 2007
timk153 timk153 is offline
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Join Date: June 23rd, 2007
Location: Newcastle
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Question Download problems

Hi there, i'm experiencing problems during download on phex, the problem is outlined below.

Any download of a considerable size will reach anything between 400Mb and 700Mb before the problem occurs.
What happens is, the download speed will drop dramatically from around 6Mbps to 500bps with a slight load increase on the CPU. However if i do not notice the drop in bandwidth (as in i'm doing somthing else at the time it happens). By the time i notice it, often the javaw.exe process (JVM) can be operating at 99-100% CPU capasity, making it hard to do much else until the process is closed. i didn't see this problem while using Phex 2.8.10 under JVM 1.4, but since ive used any version of Phex 3 with JVM 1.5 or above the problem occurs. However it i have seen the problem more often while using JVM 1.6.
I found the same problem will occur for me on Ubuntu (Debian based Linux). as well as Windows XP Pro SP2.
It looks like the JVM is going into an infinite loop. However i do not know whats causing the problem, System spec is outlined below.

HP NX6125
AMD Turion ML-28 @ 1.6Ghz
1.25Gb DDR333 (PC2700) SO-DIMM Ram.
60Gb HDD IDE interface.
(internet devices & Software) :=
Broadcom Extreme Ethernet 10/100/1000 NIC. (optimised TCP Stack).
Virgin Media 10Mbps Cable.
Phex 3.0.2.100
JVM 1.5 update 11
Windows XP Pro SP2 (50 half open TCP connections available).

When the problem occurs i do keep all the current connections to peers, just the download speed drops, ping rates stay normal (40-50ms to Google).

If anyone can help, your advice will be greatly appreciated.
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