Displaying 2 results from an estimated 2 matches for "cleanrat".
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cleanrate
2009 Oct 08
3
Solution to problem : dynamic variable drops with non-empty dirty list
...ill having a problem with my dtrace application running on a heavily loaded system. I have the following lines in my D script,
#pragma D option aggsize=8m
#pragma D option bufsize=16m
#pragma D option dynvarsize=16m
#pragma D option aggrate=0
#pragma D option stackframes=MAX_STACK
#pragma D option cleanrate=50Hz
but still I am getting the following messages,
Drop: 17458 dynamic variable drops
Drop: 3426 dynamic variable drops with non-empty dirty list
and the amount data that my D script is reporting, is gradually dropping.
This means that the tuning that I am doing using the above #pra...
2007 Nov 16
2
USDT probes from PostgreSQL
...enabled. However this result is lets say "surprising". Indeed very dangerous since database can be used in production environments. In my view this is not good.
Ok I now try to enable these 4 probes. Each probe in three clauses (12 clauses per process) for 25 processes.
After using -x cleanrate=201 -x dynvarsize=64m (determined through trial and error) and having set dtrace_dof_maxsize=1m with mdb I see the following:
After 15 minutes my test finishes and dtrace is still trying to find the probes of interest. Lots of idle time throughout this period. Although far from constant.
DTra...