Re: Performance problems on AIX 3.2 (RS6000)

Posted in 1997

David Williams — Sun, 7 Sep 1997 03:02:57 +0100 — source: Informix-list mailing list archive (1991-1998)

In article <340C3A7E.7B24@bellsouth.net>, Daniel Gurian <dgurian@bellsouth.net> writes > >Has anyone seen this problem; I am looking for a solution >to this problem: Check points are taking 20 to 30 seconds >to complete. This is causing all processes to wait until the >check point completes. Running Online 5.0 on RS6000 AIX 3.2. > >Thanks, > >Dan Gurian >Sensormatic Electronics Corp. / Boca Raton, Fl. Try reduce LRU_MAX_DIRTY and LRU_MIN_DIRTY to 5 and 10 to force more writing of modified pages to disk between checkpoints. increase LRUS to at least 8 and make CLEANERS = LRUS. This means you will be checkpointing as faster as possible. -- David Williams