Oracle Database Discussions

hi masters,

this seems to be very basic, but i would like to know internal of this process.

we all know that LGWR writes redo entries to online redo log files on disk. on commit SCN is generated and tagged to transaction. and LGWR writes this to online redo log files.

but my question is, how these redo entries comes to redo log buffer??? look all required data is fetched into buffer cache by server process. it is modified there, and committed. DBWR writes this to datafiles, but at what point, which process writes this committed transaction (i think redo entry) into log buffer cache????

does LGWR do this?? what internally happens exactly???

if you can plz focus some light on internals, i will be thankfull....


thanks and regards
VD