most disturbing is the thought that this person IS the sysadmin with this level of knowledge.
--- Tim Gorman <[EMAIL PROTECTED]> wrote: > Your Sys Admin is wrong. The SHMxxx OS parameters refer to "shared > memory", > not private process heap memory. On most UNIX variants, the "ulimit" > command is used to limit the consumption of memory for heap, stack, > etc... > > ----- Original Message ----- > To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> > Sent: Saturday, November 23, 2002 11:48 AM > > > > Hi everyone, > > > > I was always under the impression that the only concern with shmmax > was > that > > it be large enough for the SGA to fit into it. One of my System > > Administrators has just told me that the individual user processes > (i.e., > > the PGA since we're not using multi-threaded server) get added to > the SGA > > and if that SGA + user processes > shmmax the system will start > swapping. > > > > I haven't found anything to specifically address this issue on > Metalink so > I > > though I'd throw it open. We've started experiencing system > slowdown and > he > > says that increasing shmmax could resolve it. I'm skeptical (he > also > > suggested increasing SGA to decrease swapping which I told him in > no > > uncertain terms was nonsense). > > > > If anyone has a link to a note or white paper I'd appreciate that > too. > > > > I've appended his email at the bottom. This slowdown seems to occur > even > > when there's virtually on oracle activity so I'm suspecting some > other > > cause. > > > > Thanks, > > Jay Miller > > > > > > > > > > nycsun1 and njsun7 has 6 GB of memory and only 2 GB of share > memory. This > > morning nycsun1 was very slow and I noticed that there was lots of > swaping. > > see vmstst and iostat below in red: > > > > procs memory page disk faults > cpu > > r b w swap free re mf pi po fr de sr s2 s4 s4 sd in sy > cs us > sy > > id > > 0 0 23 4366736 97528 1 2186 16 12 12 95520 0 0 0 0 0 1104 3330 > 974 11 > 8 > > 81 > > 0 0 23 4365992 96056 1 451 16 24 52 85968 3 0 0 0 0 935 847 > 416 3 > 1 > > 96 > > 0 0 23 4364712 95512 2 310 36 24 492 85968 68 0 0 0 0 1036 2183 > 670 13 > 4 > > 84 > > 0 0 23 4361568 95488 9 2264 0 76 964 95520 136 0 0 0 0 979 4065 > 607 12 > 6 > > 82 > > 0 0 23 4362384 96080 1 6 4 8 8 77376 0 0 0 0 0 975 465 > 457 2 > 1 > > 97 > > 0 0 23 4361944 95712 4 730 92 48 532 95520 64 0 0 0 0 1040 1859 > 734 8 > 3 > > 89 > > 0 0 23 4360424 95480 4 41 36 40 100 77376 7 0 0 0 0 986 1250 > 542 6 > 0 > > 94 > > 0 0 23 4361304 96096 3 264 76 36 88 88496 7 0 0 0 0 1037 942 > 665 5 > 3 > > 92 > > 0 0 23 4359680 95784 2 449 4 28 84 95520 8 0 0 0 0 922 1047 > 374 4 > 1 > > 95 > > 0 0 23 4359936 95464 2 544 4 20 332 95520 44 0 0 0 0 931 1095 > 384 2 > 2 > > 96 > > > > /s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device > > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c2t6d0 > > 0.0 34.5 0.0 270.0 0.2 13.8 6.7 399.5 6 44 c5t12d0 -- > swap > > disk > > 0.0 34.5 0.0 270.0 0.5 10.7 15.5 309.4 18 39 c5t13d0 -- > swap > > disk > > > > > > This shows that the system is not effectively using memory. I > suggest > > increasing the share memory to 4 GB so that DBAs can increase their > memory > > usage. Also set priority paging on. Priority paging will give > application > > first priority then free memory will be allocated to file cache( > Solaris > 2.6 > > and 7. Solaris 8 is set dynamically). > > > > * ORACLE CONFIGS > > set shmsys:shminfo_shmmax =2048000000 -- increase to > 4096000000 > > set shmsys:shminfo_shmmin=1 > > set shmsys:shminfo_shmmni=300 > > set shmsys:shminfo_shmseg=30 > > set semsys:seminfo_semmap=500 > > set semsys:seminfo_semmni=200 > > set semsys:seminfo_semmns=2000 > > set semsys:seminfo_semmsl=1000 > > set semsys:seminfo_semmnu=500 > > set semsys:seminfo_semume=150 > > > > > > > > -- > > Please see the official ORACLE-L FAQ: http://www.orafaq.com > > -- > > Author: Miller, Jay > > INET: [EMAIL PROTECTED] > > > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > > San Diego, California -- Mailing list and web hosting > services > > > --------------------------------------------------------------------- > > 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 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > 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). > __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus – Powerful. Affordable. Sign up now. http://mailplus.yahoo.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Rachel Carmichael INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- 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).
