Sinisa Bandin escribió:
Felipe Martinez Hermo wrote:
OK, so we're apples to apples, so to speak; the servers are tuned
the same. I'll assume your disks are tuned from hdparm and up to
snuff, otherwise you wouldn't be tuning sockets ;). Did your old
server have samba settings for oplocks set?
--
Peace and Blessings,
-Scott.
"Of course, that's just my opinion; I could be wrong"
-Dennis Miller
Erm, sorry, I didn't catch that you had 2 .conf files there. I'm
back to the drawing board. Sorry about that. Anyone else have any
ideas?
Yes, that's whats shocking me. Apparently we're apples to apples.
Except for the kernel (new&slow 2.6.18-4-686 vs old&fast 2.6.8)
I've sniffed both eth0 interfaces and I've got some more information.
When talking to the slow server, the client needs to send 76 "TCP
segment of a reassembled PDU" that are not sent when talking to the
old and fast server.
How can I workaround this issue? Should I lower server's MTU? How much?
Thank you
Do you happen to have a Realtek 8169 based gigabit ethernet in new
server?
If you do, I had the same problem several times last year, and solved
all of them by changing motherboards (all were integrated, and I like
them to stay that way because I can achieve full gigabit speed with
several concurent clients)
Best regards,
Sinisa Bandin
No, machines are out-of-the-box HP DL servers:
Ethernet controller: Broadcom Corporation NetXtreme BCM5705_2 Gigabit
Ethernet (rev 03)
I've made a spreadsheet with summarizing wireshark results and comparing
results for both servers. You can see it here:
http://spreadsheets.google.com/ccc?key=pnLL2fInqFq2YKuZIphtQdA
It's meaningful that fast server makes 406 Trans2 calls, while slow
server makes 616 calls to perform the same operation. The difference is
mainly in QUERY_PATH_INFO (200 vs 305) and FIND_FIRST2 (94 vs 199) calls.
Next try: change ethernet wire? :-?
--
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Felipe Martínez Hermo
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Servicios Informáticos
UGT Galicia
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