Cristian Bradiceanu

Customers complain abount being unable to get mail via POP3, no problems with SMTP.

Possible cause: eth0: Too much work at interrupt, IntrStatus=0x0040.

More info (kernel 2.4.31, 8139too driver as module):

PCI: Found IRQ 11 for device 00:0b.0
eth0: RealTek RTL8139 at 0xd004a000, 00:30:1b:09:34:80, IRQ 11
eth0: Identified 8139 chip type 'RTL-8139C'
eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
eth0: Too much work at interrupt, IntrStatus=0x0040.


Waiting for a Linksys WRT54GS! I can’t wait to try linux on that device after the pleasant experience with WRT54G…

While searching for a secure DNS server with web administration, run over PowerDNS.

Seems to work fine, no problems noted so far. (Setup: MySQL backend, own pdns_recursor).

PowerDNS has a nice web Operational Monitor:

PDNS 2.9.18 Main Page
Uptime: 6.75 hours Queries/second, 1, 5, 10 minute averages: 2.39, 2.57, 2.46. Max queries/second: 4.64
Cache hitrate, 1, 5, 10 minute averages: 5.4%, 10%, 10%
Backend query cache hitrate, 1, 5, 10 minute averages: 73%, 63%, 59%
Backend query load, 1, 5, 10 minute averages: 4.09, 5.44, 5.57. Max queries/second: 13.3
Total queries: 51968. Question/answer latency: 0.024ms


Web administration: PowerAdmin (PHP, MySQL).

After almost 20 hours uptime:

Uptime: 19.3 hours Queries/second, 1, 5, 10 minute averages: 1.38, 2.01, 1.97. Max queries/second: 5.62
Cache hitrate, 1, 5, 10 minute averages: 9.4%, 9.2%, 10%
Backend query cache hitrate, 1, 5, 10 minute averages: 53%, 55%, 55%
Backend query load, 1, 5, 10 minute averages: 3.57, 5, 4.75. Max queries/second: 13.3
Total queries: 125913. Question/answer latency: 0.022ms


Test machine setup:

• AMD Sempron(tm) 2200+
• 512MB RAM
• custom-compiled 2.4.31 linux kernel on slackware 10.1-based distribution