I hesitated mentioning that parameter in this forum, but I figured what the heck? Could be fun, in a sick way... :-)
Once I was teaching a DBA class and mentioned "_DISABLE_LOGGING". Immediately, I saw every head in the class look down, scribbling furiously! I had to backtrack very quickly and warn of the consequences of disabling redo logging (i.e. database corruption if not shutdown normally for any reason)... ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Monday, June 24, 2002 2:48 PM > Hi Tim > > Yes, I have tried the _disable_logging, does not work on all platforms. DB > starts up fine, but redo log is generated, evidenced by log switching going > on. > > Also if I do a normal DML (large-ish one to verify), then dump the redo log, > I see my transaction there, so for a 420R, running Solaris8 and Oracle > 9.0.1, it would seem that _disable_logging does not work. > > I don't want to complicate the picture even further with transportable > tablespaces, which would mean that I would need to store all dependent > objects (in this case indexes only) in the same tablespace, which I could > easily achieve by rebuilding all indexes using a dynamic SQL. > > Informatica BTW does not only do single level inserts, version 5.0 onwards > has a 'bulk load' feature, but I am not sure what this actually does. > Previously Sagent also had a 'direct load' switch, which meant that it wrote > all of its data to large (very large) flat files and then used Sql*Loader > direct path to load. Fast, but Sagent at the time was very unreliable, > because on identical runs, it would sometimes load all the data, sometimes > only a portion, and every time, would report no errors and everything hunky > dory, until you went looking for your data. I remember that took me about a > week of arguing to prove that Sagent was at fault. > > Thanks for the suggestion of the Non volatile RAM (NVRAM) unit, it makes the > most sense. I will suggest this to my damagers. > > Regards: > Ferenc Mantfeld > Senior Performance Engineer > Siebel Performance Engineering > Melbourne, 3000, VIC, Australia > Only Robinson Crusoe had all his work done by Friday > > > -----Original Message----- > Sent: Sunday, 23 June 2002 9:03 PM > To: Multiple recipients of list ORACLE-L > > > Have you considered setting "_DISABLE_LOGGING = TRUE" > instead? It could be just as disastrous... ;-) > > Buying an NVRAM unit would probably be more sensible, since > at least then you have some probability of the file-system > on such a unit surviving node failure or restart. > > I don't use Informatica, but I believe it mainly does > single-row inserts, so not using the APPEND hint is a > blessing anyway. After all, who likes one row in each > database block? However, I could be wrong about that and it > may actually be performing multi-row/array insertions... > > I don't know what your loads are like, but how about > something like this instead? > > - create a small database with _DISABLE_LOGGING set to > TRUE > - use Informatica to load into a tablespace on that small, > sacrificial db > - use "transportable tablespace" to copy the tablespace to > your real DW > > Just an idea (better you than me to try it!)... > > ----- Original Message ----- > To: "Multiple recipients of list ORACLE-L" > <[EMAIL PROTECTED]> > Sent: Sunday, June 23, 2002 8:53 PM > > > > Hi All > > > > does anyone have any white paper or info on how to > configure a dedicated > > portion of real memory as a virtual drive on Solaris ? I > want to move my > > online redo logs (4 X 128 M single threaded) for a 300 GB > DW onto it, to > > speed up Informatica ETL, since Informatica does not allow > me to specify /*+ > > APPEND */ mode of insert. I know I will not bypass the SQL > layer this way, > > but at least, the LGWR will be writing to memory instead > of disk. Thanks in > > advance. > > > > Regards: > > Ferenc Mantfeld > > Senior Performance Engineer > > Siebel Performance Engineering > > Melbourne, 3000, VIC, Australia > > Only Robinson Crusoe had all his work done by Friday > > > > > > -----Original Message----- > > Sent: Saturday, 22 June 2002 9:03 PM > > To: Multiple recipients of list ORACLE-L > > > > > > On Solaris > > > > ps -ef -opid,ppid,vsz=VIRTMEM -orss=PHYSMEM > -opmem,pcpu,user,args > > > > use: > > > > psrinfo -v > > prtconf | grep Mem > > format > > uname -a > > > > HTH > > > > Richard > > > > -----Original Message----- > > Sent: Saturday, June 22, 2002 1:38 PM > > To: Multiple recipients of list ORACLE-L > > > > > > Good day to everyone... > > > > I have two questions related to Linux and Solaris... > > > > * I need do find memory usage (physical, virtual...) of a > particular > > proccess. PID is given by by "ps", but what aditional > parameters I have to > > provide? At a first glance, output of "man ps" vas > confusing... > > > > * How do I find computer's configuration - what CPU, > numbers of CPUs, clock, > > amount of memory, number of harddrives, what version of > OS, what OS patches > > are applied...? > > > > No, I can't ask sysadmin about that (hard to explain), > and, no, I don't have > > any kind of advanced manuals... > > > > Thanks in advance, > > Vladimir > > > > -- > > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > > -- > > Author: Vladimir Barac - posao > > INET: [EMAIL PROTECTED] > > > > Fat City Network Services -- (858) 538-5051 FAX: (858) > 538-5051 > > San Diego, California -- Public Internet access / > Mailing Lists > > > ------------------------------------------------------------ > -------- > > To REMOVE yourself from this mailing list, send an E-Mail > message > > to: [EMAIL PROTECTED] (note EXACT spelling of > 'ListGuru') and in > > the message BODY, include a line containing: UNSUB > ORACLE-L > > (or the name of mailing list you want to be removed from). > You may > > also send the HELP command for other information (like > subscribing). > > -- > > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > > -- > > Author: Ji, Richard > > INET: [EMAIL PROTECTED] > > > > Fat City Network Services -- (858) 538-5051 FAX: (858) > 538-5051 > > San Diego, California -- Public Internet access / > Mailing Lists > > > ------------------------------------------------------------ > -------- > > To REMOVE yourself from this mailing list, send an E-Mail > message > > to: [EMAIL PROTECTED] (note EXACT spelling of > 'ListGuru') and in > > the message BODY, include a line containing: UNSUB > ORACLE-L > > (or the name of mailing list you want to be removed from). > You may > > also send the HELP command for other information (like > subscribing). > > > > > > -- > > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > > -- > > Author: Ferenc Mantfeld > > INET: [EMAIL PROTECTED] > > > > Fat City Network Services -- (858) 538-5051 FAX: (858) > 538-5051 > > San Diego, California -- Public Internet access / > Mailing Lists > > > ------------------------------------------------------------ > -------- > > To REMOVE yourself from this mailing list, send an E-Mail > message > > to: [EMAIL PROTECTED] (note EXACT spelling of > 'ListGuru') and in > > the message BODY, include a line containing: UNSUB > ORACLE-L > > (or the name of mailing list you want to be removed from). > You may > > also send the HELP command for other information (like > subscribing). > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing Lists > -------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: Ferenc Mantfeld > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing Lists > -------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Tim Gorman INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
