Shared memory and swap staying high 2004-02-12 - By Percent, Lonnie M.
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Hi all,
AS2.1 2.4.9-e.25smp
4GB ram 4 Xeons 4 70GB dirves RAID 1/0
Progress 9.1d database. i am running init 3
shmmax was set to 33554432
Yesterday I increased it to 134217728 for better database buffering
i ran a process that had to use swap. it finished but swap was never
cleared.
i took down the database and still swap was never cleared.
this morning with no database server running - just barebones processes
all of swap being used and alot of shared memory too.
i then rebooted . top showed everything cleared and 0k swap .
i am not sure what to make of this. it seems to me
that when swap is no longer being used it would show 0k used.
also shared memory stayed high and memory used stayed high.
is this normal behavior for this kernel? should i expect to see these
figures never decrease once they increase? is this just a flaw in the
top reporting?
any input would be greatly appreciated.
before reboot:
9:24am up 13 days, 10:54, 2 users, load average: 0.00, 0.00, 0.00
53 processes: 52 sleeping, 1 running, 0 zombie, 0 stopped
CPU0 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle
CPU1 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle
CPU2 states: 0.1% user, 0.0% system, 0.0% nice, 99.4% idle
CPU3 states: 0.0% user, 0.2% system, 0.0% nice, 99.3% idle
Mem: 3992204K av, 2736612K used, 1255592K free, 728660K shrd, 258844K
buff
Swap: 2096440K av, 2096440K used, 0K free 1068788K
cached
after reboot:
12:40pm up 1:50, 4 users, load average: 0.01, 0.01, 0.00
69 processes: 68 sleeping, 1 running, 0 zombie, 0 stopped
CPU0 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle
CPU1 states: 0.1% user, 0.2% system, 0.0% nice, 99.2% idle
CPU2 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle
CPU3 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle
Mem: 3992204K av, 1487080K used, 2505124K free, 1250948K shrd, 72320K
buff
Swap: 2096440K av, 0K used, 2096440K free 80564K
cached
TIA
Lonnie Percent
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<DIV > <FONT face=Tahoma size=2 >Hi all, <BR > <BR >AS2.1 2.4.9-e.25smp <BR >4GB ram 4
Xeons 4 70GB dirves RAID 1/0 </FONT > </DIV >
<P > <FONT face=Arial size=2 >Progress 9.1d database. i am running init
3 </FONT > </P >
<DIV > <FONT face=Arial size=2 >shmmax was set to 33554432 <BR >Yesterday I increased
it to 134217728 for better database buffering </FONT > </DIV >
<DIV > <FONT face=Arial size=2 > <BR >i ran a process that had to use swap. it
finished but swap was never cleared. </FONT > </DIV >
<DIV > <FONT face=Arial size=2 >i took down the database and still swap was never
cleared. </FONT > </DIV >
<DIV > <FONT face=Arial size=2 > <BR >this morning with no database server running -
just barebones processes </FONT > </DIV >
<DIV > <FONT face=Arial size=2 >all of swap being used and alot of shared memory
too. </FONT > </DIV > <FONT face=Arial size=2 > </FONT > <FONT size=+0 >
<DIV > <FONT face=Arial color=#0000ff size=2 > </FONT > </FONT > <FONT face=Tahoma > <FONT
face=Arial > <FONT face=Tahoma > <FONT face=Arial > <FONT color=#ff0000 > <FONT
color=#000000 > </FONT > </FONT > </FONT > </FONT > </DIV >
<DIV >
<DIV > <FONT color=#ff0000 > <FONT color=#000000 size=2 >i then rebooted <SPAN
class=074165218-12022004 > <FONT color=#0000ff > . top showed everything
cleared and 0k swap </FONT > </SPAN >. </FONT > </FONT > </DIV >
<DIV > <FONT size=2 > </FONT > </DIV >
<DIV > <FONT size=2 >i am not sure what to make of this. it seems to me </FONT >
<DIV > <FONT face=Tahoma > <FONT face=Arial size=2 >that when swap is no longer being
used it would show 0k used. </FONT > </FONT > </DIV >
<DIV > <FONT size=2 >also shared memory stayed high and memory used stayed
high. </FONT > </DIV >
<DIV > <FONT size=2 > </FONT > </DIV >
<DIV > <FONT size=2 >is this normal behavior for this kernel? should i expect to
see these </FONT > </DIV >
<DIV > <FONT size=2 >figures never decrease once they increase? is this just a flaw
in the </FONT > </DIV >
<DIV > <FONT size=2 >top reporting? </FONT > </DIV >
<DIV > <FONT size=2 > </FONT > </DIV >
<DIV > <FONT size=2 >any input would be greatly appreciated. </FONT > </DIV >
<DIV > <FONT size=2 > </FONT > </DIV >
<DIV > <FONT size=2 > </FONT > </DIV > </DIV >
<DIV > <FONT size=2 >before reboot: <BR > 9:24am up 13 days, 10:54,
2 users, load average: 0.00, 0.00,
0.00 <BR >53 processes: 52
sleeping, 1 running, 0 zombie, 0
stopped <BR >CPU0
states: 0.0% user, 0.0% system, 0.0% nice, 100.0%
idle <BR >CPU1
states: 0.0% user, 0.0% system, 0.0% nice, 100.0%
idle <BR >CPU2
states: 0.1% user, 0.0% system, 0.0% nice, 99.4%
idle <BR >CPU3
states: 0.0% user, 0.2% system, 0.0% nice, 99.3%
idle <BR >Mem:
3992204K av, 2736612K used, 1255592K free, 728660K shrd, 258844K
buff <BR > </FONT > </FONT > <FONT size=2 > <FONT face=Arial > <FONT
color=#ff0000 >Swap: 2096440K av, 2096440K
used, 0K
free
1068788K cached </FONT > </FONT > </FONT > </FONT > </DIV > </DIV >
<DIV > <FONT face=Tahoma > <FONT size=2 > <FONT face=Arial > <FONT
color=#ff0000 > </FONT > </FONT > </FONT > </FONT > </DIV >
<DIV > <FONT face=Arial size=2 > </FONT > </DIV >
<DIV > <FONT face=Arial size=2 >after reboot: </FONT > </DIV >
<DIV > <FONT face=Tahoma > <FONT size=2 > <FONT face=Arial > <FONT color=#ff0000 > <FONT
color=#000000 > 12:40pm up 1:50, 4 users, load
average: 0.01, 0.01,
0.00
<BR >69 processes: 68 sleeping, 1 running, 0 zombie, 0
stopped
<BR >CPU0 states: 0.0% user, 0.0% system, 0.0% nice, 100.0%
idle
<BR >CPU1 states: 0.1% user, 0.2% system, 0.0% nice, 99.2%
idle
<BR >CPU2 states: 0.0% user, 0.0% system, 0.0% nice, 100.0%
idle
<BR >CPU3 states: 0.0% user, 0.0% system, 0.0% nice, 100.0%
idle
<BR >Mem: 3992204K av, 1487080K used, 2505124K free, 1250948K
shrd, 72320K buff <BR > <FONT color=#ff0000 >Swap: 2096440K
av, 0K used, 2096440K
free
80564K cached
<BR > </FONT >
<BR > </FONT > </DIV >
<DIV > <FONT color=#000000 >TIA </FONT > </DIV >
<DIV > <FONT color=#000000 > </FONT > </DIV >
<DIV > <FONT color=#000000 >Lonnie Percent </FONT > </DIV >
<DIV > <FONT color=#000000 > </FONT > </DIV >
<DIV > <BR > </FONT > <BR > </DIV > </FONT > </FONT > </FONT > </BODY > </HTML >
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