[cvsnt] CVSNT slow response with multiple users

John Van Norman jvn76 at msn.com
Tue Jan 29 04:28:50 GMT 2008

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We are having an ongoing issue with CVSNT version 2.5.03 (Scorpio) Build 
2382 where CVS transactions become extremely slow if more then a couple of 
people are hitting the server at once.

The server has Windows Server 2003 Standard with Service Pack 2, dual 
dual-core 3.0 GHz Xeon processors, 4GB of ram, two 1GB NICs (bound 
together), and EMC Symmetrix SAN storage.

There are five repositories on the server, of which three are in active 
development.  The largest repository is 5GB.  The largest module within that 
repository is 1.15GB.  When checked out that module is 580MB.

We have about 70 people working on this project, 6 of which are in a remote 
office connected by a 15Mb T3.

DNS has been verified to be working correctly for all clients and the 
server.  During the times that CVS is responding slowly, processor usage is 
rarely above 5%, memory usage is at about 1GB sometimes up to about 1.5GB 
depending on what the transactions are doing, disk queue length is typically 
0 to 1, network usage is at about .5%, and local checkouts on the server it 
take just as long as from a client pc.

I have tried having everything run on local disks instead of the SAN; all 
transactions ran slower.  Removing on access virus scanning helped improve 
speeds by about 20% for a single isolated transition (no one else on the 
server), but CVSNT still responded slowly when multiple people were using 
the server.

The problem seems to be most evident when more then one connection from the 
remote office is established.   CVS seems to be responding to all cvs.exe 
processes at the same speed as the slowest process.

When this problem occurs, the only way to clear it up seems to be to kill 
most of the cvs.exe processes on the server.  At that point the

What am I missing?  Does anyone have any ideas of what could be causing 
these slowdowns?

Any help would be appreciated.



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