[zzh@ncic.ac.cn: RE: Why systemtap loses events and what can be done about it?]

[Mike Mason]

Is the .maxactive suffix documented anywhere?

Mike

Frank Ch. Eigler wrote:
> ----- Forwarded message from ??? <zzh@ncic.ac.cn> -----
> Subject: RE: Why systemtap loses events and what can be done about it?
> Date: Wed, 5 Sep 2007 21:13:48 +0800
> 
> Hi-
> I optimize my script  by getting rid of the global str_sock, 
> and add a ".maxactive(1000)"  probe point suffix to  tcp.recvmsg.return.
> 
> It works very well. I have tried 800 clients concurrently explore the
> web site monitored by systemtap script and no event loss was found.
> Sometimes the ejb server and database server have nearly 100% cpu
> usage!
> 
> Thank You very much! Your suggestion really give me great help.