Memory usage problem on AIX 7.1

Hi,
We are running Oracle 11GR2 EE on AIX 7.1 and keep getting alerts on the pgchecks (memory paging).
The alerts are coming from another system monitoring tool (Hobbit), but our sys admins are telling us it is because we are overallocating memory.
In our case, we have an 8G SGA for the only database.
Then, we are running grid and ASM.
How can I check the actual (real) memory usage by individual processes of our Oracle database, our emagent (OMS agent), and for our ASM. In our case, we have 32G of Real Memory installed, and we should not be having a memory paging issue.
For the Oracle database, it is set for 8G.
NAME                                 TYPE        VALUE
lock_sga                             boolean     FALSE
pga_aggregate_target                 big integer 0
pre_page_sga                         boolean     FALSE
sga_max_size                         big integer 8480M
sga_target                           big integer 0For our ASM instance, it is set for 270M
SQL> sho sga
NAME                                 TYPE        VALUE
lock_sga                             boolean     FALSE
pga_aggregate_target                 big integer 0
sga_max_size                         big integer 272M
sga_target                           big integer 0

do as below (vmstat takes 2 minutes to complete)
bcm@bcm-laptop:~$ vmstat 6 20
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b   swpd   free   buff cache   si   so    bi    bo   in   cs us sy id wa
0 0      0 1347636 81396 1592120    0    0   264    22 382 651 8 3 84 5
0 0      0 1347664 81404 1592144    0    0     0    13 515 1028 4 1 95 0
0 0      0 1353136 81412 1592144    0    0     0    14 507 1021 3 1 95 0
0 0      0 1353012 81420 1592144    0    0     0    23 523 1033 3 1 95 0
0 0      0 1353044 81428 1592144    0    0     0    13 513 1026 3 1 96 0
0 0      0 1353044 81436 1592144    0    0     0    15 517 1045 3 2 95 0
0 0      0 1352920 81444 1592144    0    0     0    15 505 1012 3 1 96 0
1 0      0 1347448 81452 1592156    0    0     1    21 521 1038 4 2 94 0
0 0      0 1347448 81460 1592156    0    0     0    28 513 1030 3 2 95 0
0 0      0 1347448 81468 1592180    0    0     1    21 529 1053 4 1 95 0
0 0      0 1347200 81484 1592176    0    0     0    39 530 1067 3 2 95 0
1 0      0 1347200 81492 1592172    0    0     0    14 530 1058 3 1 96 0
0 0      0 1352796 81500 1592172    0    0     0    17 514 1034 3 2 95 0
0 0      0 1352796 81508 1592180    0    0     0    21 516 1049 6 1 92 0
0 0      0 1352764 81516 1592180    0    0     0    15 506 1024 2 1 95 1
0 0      0 1352252 81524 1592180    0    0     0    15 563 1090 3 2 95 0
0 0      0 1351836 81532 1592180    0    0     0    15 550 1066 4 1 94 0
0 0      0 1346768 81540 1592200    0    0     1    18 547 1111 4 2 94 0
1 0      0 1346152 81548 1592204    0    0     0    69 524 1059 3 2 94 0
0 0      0 1346472 81556 1592244    0    0     1    17 498 1012 2 1 96 0

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=================================
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another example, this problem stop me make certain things, for example is impossible browsing in web while programming in eclipse, this is very uncomfortable.
other thing, this not occur in Windows XP, I can open more than 10 tabs in firefox, and eclipse open, etc...
any needing information, tell-me!
firefox*: with memory cache turned off in about:config
Last edited by hotvic (2013-08-12 17:42:21)

hotvic, could you please change the title to something more descriptive? 'memory problems' sounds like you have problems e.g. remembering / recalling things, which is not an Arch issue ;P
kenny3794 wrote:
I've had some limiting performance with browsers lately (Firefox and Chromium). I found it had a considerable cache size utilizing lots of fragmented space on my home directory. I cleared the cache and have since set a limit to the cache size of 30 MB for Firefox. Between multiple users across multiple browser sessions, I had at least 2 GB of cache data on my 10 GB home partition! So far (1 day), this has been helpful. Perhaps this could help you also?
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55%, it's still 1.6Gb....there shouldn't be a problem scanning something that it says will take up 300Mb, then actually only takes up 70Mb.
And not wrong, it obviously isn't releasing the memory when other applications need it because it doesn't, I have to close PS before it will release it. Yes, it probably is supposed to release it, but it isn't.
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I'm running PS CS3 on Vista Home Premium, 1.86Ghz Intel core 2 processor, and 4GB RAM.
I realise Vista only sees 3.3GB of this RAM, and I know Vista uses about 1GB all the time.
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While running PS, and only PS, with no files open, I have 2GB of RAM, why will PS not let me scan a file that it says will take up 300Mb?
200Mb is about the limit that it will let me scan, but even then, the actual end product ends up being less than 100Mb. (around 70mb in most cases)I'm using a Dell AIO A920, latest drivers etc, and PS is set to use all avaliable RAM.
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55%, it's still 1.6Gb....there shouldn't be a problem scanning something that it says will take up 300Mb, then actually only takes up 70Mb.
And not wrong, it obviously isn't releasing the memory when other applications need it because it doesn't, I have to close PS before it will release it. Yes, it probably is supposed to release it, but it isn't.
Thank you for your answer (even if it did appear to me to be a bit rude/shouty, perhaps something more polite than "Wrong!" next time) but I'm sitting at my computer, and I can see what is using how much memory and when, you can't.

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55%, it's still 1.6Gb....there shouldn't be a problem scanning something that it says will take up 300Mb, then actually only takes up 70Mb.
And not wrong, it obviously isn't releasing the memory when other applications need it because it doesn't, I have to close PS before it will release it. Yes, it probably is supposed to release it, but it isn't.
Thank you for your answer (even if it did appear to me to be a bit rude/shouty, perhaps something more polite than "Wrong!" next time) but I'm sitting at my computer, and I can see what is using how much memory and when, you can't.

Having a problem with Excessive "modified" memory usage in Win7 x64, upwards of 3.6GB, any suggestions?

I have 6GB of ram, a fresh install of Windows 7 x64, and the screenshot shows what happens after leaving my PC on for a couple days. (3782+MB being used by modified memory ATM).
http://wow.deconstruct.me/images/ExcessiveMemory.jpg
Any ideas on this?
Edit:
Added this after first round of suggestions
http://wow.deconstruct.me/images/NotSoExcessiveMemory.jpg
This is uptime of around 2 hours.
The first image is of uptime of around 3-5 days.

Matthew,
The only reason why these pages are kept on the modified list indefinitely is because the system doesn't have any available pagefile space left. If you increase the size of the pagefile the system will write most of these pages to disk and then move them from the modified list to the standby list. Standby pages are considered part of "available memory", because they can be reused for some other purpose if necessary.
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By the way, Windows doesn't use pagefiles as "extra memory", it uses them as a backing store for private pages, just like regular files are used as a backing store for EXEs/DLLs and memory mapped files. So if the system really has more than enough RAM (like in your second screenshot, where you have 3.6 GB of free pages) you shouldn't see any reads from the pagefile. You can verify this by going to the Disk tab in the resource monitor and looking for any disk IO from pagefile.sys. On smaller systems that don't have an excess of free pages you may see periodic reads from the pagefile, and this is expected because the total amount of data referenced by the OS/drivers/processes is larger than the total RAM. Forcefully keeping all pagefile-backed pages in memory (which is what disabling the pagefile does) would simply mean some other pages (memory mapped files, DLL code or data etc) would have to be paged out.
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