Deleting default trace file in java

Question

Hello all,
Whats the best way to automatically delete default trace file in java instance? I want to delete these files lets say every week or 2 wkkds,Is there any type of configuration that can be done through NWA or OS...? or do i have to write some scripts? Please advice.

Answer 1

Perfect.
  When set to 10, 0 -->9 are cyclic files. Regarding archiving, yes this is possible. Apart from defaulttrace files you can also archive other java log files (system, network,security etc). The configuration procedure is explained :-
http://help.sap.com/saphelp_nw04/helpdata/en/48/2edfd5bd3e0d4a81b90325fe195a70/frameset.htm
Once the 10th trace file(i.e.defaultrace9) is full, all the trace files (from defaulttrace0-defaultrace9) are zipped to a single file. The file compression ratio is extremely good.
Unfortunately there is no automated mechanism to clear off the archived files. This needs manual intervention(regular cleanup, script etc).
The archived log files may also be viewed for analysis from NWA.
While estimating the size for each defaulttrace consider  three factors  i) System load ii) Number of defaulttrace files.
iii) Retention days(without archiving)
Ex: System load as observed :
Say the trace file size is 10MB and 6 trace files get written in 4 hours of peak time and 1 trace files is written for 4 hours during non-peak time .Assuming 8 hours of peak business hours and rest all non-working hours.
No of files generated is 62 + 14 = 16 files of 10 MB each are generated per week day
If the defaulttrace file  count is set to 16, you can retain one days' logs . Say you wish to retain the same with less number of files (i.e. 8) you would have to increase the file size to 20 MB. Also will have to look at file system space availability.
               CAUTION: For a file system occupancy estimate, you will have to also consider as to how many Server nodes are 
                                configured as each node has its own log area !
For this you need to observe the pattern as to how many files are being written then estimate the size and count
cheers !
PRADi