KDE 4.4 eating up more RAM than 4.3

Given the same settings on both versions and after numerous testing, upon bootup, KDE 4.4 is eating up more RAM than KDE 4.3, at least 25 MB more on the average. I realize the developers mentioned they fixed numerous bugs from the previous version, but shouldn't they be working on getting it lighter? Where's the most likely culprit for this additional RAM usage? Can it be attributed to the newer QT version 4.6.1, or something else? Opinions much appreciated, thanks.
Last edited by ejmarkow (2010-02-10 21:07:15)

eldarion wrote:It's not that simple. I'ts a controversial subject that was discussed many times before.
As for preload, i installed that some time ago and after 1-2 months i found out that it don't give me a visible speedup on cold start of my apps. In fact, the only thing it was doing was making my linux boot very slow.
Well, it really is that simple. If I have spare RAM, I want something on my computer to start using it.
Preload greatly increases speed on my end on some apps. Mostly big apps, like Openoffice and Kontact, which starts instantly with preload, and takes forever to run if I disable it. It doesn't increase boot time at all for me (I just start it in background, the rest of the loading happens after login and is not noticable on my system). Guess our milage are different.
unixguru wrote:
rune0077 wrote:
Don't complain about RAM-use unless you're running out. Free RAM is wasted RAM (and, worse, wasted money you spend on that RAM). If there's RAM not being used, a good OS will find ways to use it.
Instead of worrying about how to free up your used RAM, start worrying about how to use the RAM that is not being used (increase browser-cache, install preload, give Nepomuk more memory, etc).
Certainly free RAM is a wasted resource, but the point of the discussion is whether the increase in RAM usage on KDE 4.4 is a good use of RAM. It is quite possible that the increase in RAM usage is due to bugs introduced in the new code and tracing the exact cause is helpful when one wants to submit a bug report to the KDE team. The RAM saved this way could be used for more useful things in the next release of KDE.
True. I was making a general statement, not being specific to KDE. Memory leaks are obviously not RAM being put to good use.
In KDE 4.3 I found nepomuk all but useless. It slowed down my desktop and had a bad habbit of crashing Dolphin. Now it seems to run pretty well and I barely notice it, but it does take up a lot of my RAM compared to memory-usage in 4.3. But then, I feel like I'm getting something for my money. And I still got lots of RAM to spare, and no ideas on what to use it on.
Last edited by rune0077 (2010-02-13 17:01:39)

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//rv
system details:
COMMAND
nohup /system/jre/bin/java -XX:+DisableExplicitGC -XX:NewSize=80m -XX:MaxNewSize=80m -Xms256m -Xmx256m -cp /system/bin/application.jar: applicationstart >/sysem/bin/../log/jvm.log
JAVAVERSION
SRV12345/root # /system/jre/bin/java -fullversion
java full version "1.4.2_08-b03"
OS-VERSION
[root@SRV12345] /->uname -r
5.8
TASKS
[root@SRV12345] /->prstat
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
6415 root 964M 913M sleep 29 10 20:33.12 0.3% java/128
Total: 75 processes, 310 lwps, load averages: 0.02, 0.04, 0.08
CPUS
root@SRV12345] /->psrinfo -v
Status of virtual processor 0 as of: 07/27/06 16:33:23
on-line since 05/22/06 11:40:25.
The sparcv9 processor operates at 1320 MHz,
and has a sparcv9 floating point processor.
Status of virtual processor 1 as of: 07/27/06 16:33:23
on-line since 05/22/06 11:40:26.
The sparcv9 processor operates at 1320 MHz,
and has a sparcv9 floating point processor.
HARDWARE
[root@SRV12345] /->prtconf
System Configuration: Sun Microsystems sun4us
Memory size: 4096 Megabytes
System Peripherals (Software Nodes):
MEMORY USAGE - PROCESS
[root@SRV12345] /->pmap -x 6415
6415: /oms/OMSSpooler/system/jre/bin/java -XX:+DisableExplicitGC -XX:NewSize
Address Kbytes Resident Shared Private Permissions Mapped File
00010000 72 72 72 - read/exec java
00030000 16 16 - 16 read/write/exec java
00034000 636528 636456 618112 18344 read/write/exec [ heap ]
DA77A000 8 8 - 8 read/write/exec [ anon ]
DA77E000 16 16 8 8 read/write/exec [ anon ]
DAD7A000 32 32 8 24 read/write/exec [ anon ]
DAE7A000 32 32 8 24 read/write/exec [ anon ]
DB07A000 32 32 8 24 read/write/exec [ anon ]
DB17A000 32 32 8 24 read/write/exec [ anon ]
DB278000 40 40 32 8 read/write/exec [ anon ]
DB67A000 32 32 8 24 read/write/exec [ anon ]
DB97A000 32 32 8 24 read/write/exec [ anon ]
DBA7A000 32 32 24 8 read/write/exec [ anon ]
DBB7A000 32 32 8 24 read/write/exec [ anon ]
DBC7A000 8 8 8 - read/write/exec [ anon ]
DBC7E000 16 16 8 8 read/write/exec [ anon ]
DBD76000 48 48 48 - read/write/exec [ anon ]
DBE7A000 32 32 8 24 read/write/exec [ anon ]
DBF78000 40 40 24 16 read/write/exec [ anon ]
DC07A000 8 8 - 8 read/write/exec [ anon ]
DC07E000 16 16 - 16 read/write/exec [ anon ]
DC17A000 32 32 24 8 read/write/exec [ anon ]
DC27A000 8 8 8 - read/write/exec [ anon ]
DC27E000 16 16 8 8 read/write/exec [ anon ]
DC37A000 8 8 8 - read/write/exec [ anon ]
DC37E000 16 16 8 8 read/write/exec [ anon ]
DC47A000 8 8 8 - read/write/exec [ anon ]
DC47E000 16 16 8 8 read/write/exec [ anon ]
DC778000 16 16 8 8 read/write/exec [ anon ]
DC77E000 16 16 - 16 read/write/exec [ anon ]
DC87A000 8 8 8 - read/write/exec [ anon ]
DC87E000 16 16 8 8 read/write/exec [ anon ]
DC97A000 8 8 8 - read/write/exec [ anon ]
DC97E000 16 16 8 8 read/write/exec [ anon ]
DCA7A000 8 8 8 - read/write/exec [ anon ]
DCA7E000 16 16 8 8 read/write/exec [ anon ]
DCB7A000 8 8 8 - read/write/exec [ anon ]
DCB7E000 16 16 8 8 read/write/exec [ anon ]
DCF7A000 32 32 16 16 read/write/exec [ anon ]
DD07A000 32 32 8 24 read/write/exec [ anon ]
DD17A000 32 32 8 24 read/write/exec [ anon ]
DD278000 40 40 16 24 read/write/exec [ anon ]
DD478000 40 40 40 - read/write/exec [ anon ]
DD67A000 32 32 8 24 read/write/exec [ anon ]
DD778000 40 40 16 24 read/write/exec [ anon ]
DDA7A000 32 32 16 16 read/write/exec [ anon ]
DDB78000 40 40 16 24 read/write/exec [ anon ]
DDC7A000 8 8 - 8 read/write/exec [ anon ]
DDC7E000 16 16 8 8 read/write/exec [ anon ]
DDD78000 40 40 32 8 read/write/exec [ anon ]
DDE78000 40 40 40 - read/write/exec [ anon ]
DE07A000 32 32 8 24 read/write/exec [ anon ]
DE178000 40 40 16 24 read/write/exec [ anon ]
DE276000 48 48 40 8 read/write/exec [ anon ]
DE37A000 32 32 8 24 read/write/exec [ anon ]
DE578000 40 40 16 24 read/write/exec [ anon ]
DE77A000 32 32 16 16 read/write/exec [ anon ]
DE87A000 32 32 32 - read/write/exec [ anon ]
DE97A000 32 32 8 24 read/write/exec [ anon ]
DEA78000 40 40 16 24 read/write/exec [ anon ]
DEB7A000 32 32 16 16 read/write/exec [ anon ]
DEC7A000 32 32 8 24 read/write/exec [ anon ]
DED78000 40 40 40 - read/write/exec [ anon ]
DEE7A000 32 32 8 24 read/write/exec [ anon ]
DEF7A000 32 32 8 24 read/write/exec [ anon ]
DF07A000 32 32 16 16 read/write/exec [ anon ]
DF27A000 32 32 24 8 read/write/exec [ anon ]
DF478000 40 40 40 - read/write/exec [ anon ]
DF578000 40 40 - 40 read/write/exec [ anon ]
DF77A000 32 32 8 24 read/write/exec [ anon ]
DF87A000 32 32 16 16 read/write/exec [ anon ]
DFA78000 40 40 16 24 read/write/exec [ anon ]
DFC7A000 8 8 - 8 read/write/exec [ anon ]
DFC7E000 16 16 - 16 read/write/exec [ anon ]
E0078000 40 40 8 32 read/write/exec [ anon ]
E0278000 40 40 16 24 read/write/exec [ anon ]
E067A000 32 32 24 8 read/write/exec [ anon ]
E077A000 8 8 8 - read/write/exec [ anon ]
E077E000 16 16 8 8 read/write/exec [ anon ]
E0878000 40 40 32 8 read/write/exec [ anon ]
E0978000 40 40 32 8 read/write/exec [ anon ]
E0A78000 40 40 24 16 read/write/exec [ anon ]
E0B78000 40 40 16 24 read/write/exec [ anon ]
E0C78000 40 40 32 8 read/write/exec [ anon ]
E0E7A000 8 8 8 - read/write/exec [ anon ]
E0E7E000 16 16 8 8 read/write/exec [ anon ]
E1076000 48 48 48 - read/write/exec [ anon ]
E117A000 32 32 32 - read/write/exec [ anon ]
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E137A000 32 32 8 24 read/write/exec [ anon ]
E147A000 32 32 32 - read/write/exec [ anon ]
E1578000 40 40 16 24 read/write/exec [ anon ]
E187A000 8 8 - 8 read/write/exec [ anon ]
E187E000 16 16 - 16 read/write/exec [ anon ]
E1978000 40 40 24 16 read/write/exec [ anon ]
E1A78000 40 40 24 16 read/write/exec [ anon ]
E1B78000 40 40 16 24 read/write/exec [ anon ]
E1C7A000 32 32 16 16 read/write/exec [ anon ]
E1D7A000 32 32 8 24 read/write/exec [ anon ]
E1E78000 40 40 24 16 read/write/exec [ anon ]
E1F78000 40 40 8 32 read/write/exec [ anon ]
E207A000 32 32 32 - read/write/exec [ anon ]
E217A000 8 8 8 - read/write/exec [ anon ]
E217E000 16 16 8 8 read/write/exec [ anon ]
E227A000 32 32 8 24 read/write/exec [ anon ]
E2378000 40 40 16 24 read/write/exec [ anon ]
E247A000 32 32 32 - read/write/exec [ anon ]
E257A000 32 32 16 16 read/write/exec [ anon ]
E267A000 32 32 16 16 read/write/exec [ anon ]
E2878000 40 40 16 24 read/write/exec [ anon ]
E297A000 32 32 16 16 read/write/exec [ anon ]
E2A7A000 32 32 16 16 read/write/exec [ anon ]
E2B7A000 32 32 16 16 read/write/exec [ anon ]
E2C00000 4408 688 688 - read/exec librfccm.so
E305C000 2584 664 624 40 read/write/exec librfccm.so
E32E2000 688 320 312 8 read/write/exec librfccm.so
E3400000 2072 120 120 - read/exec libsapjcorfc.so
E3614000 24 24 24 - read/write/exec libsapjcorfc.so
E36FA000 32 32 8 24 read/write/exec [ anon ]
E38FA000 8 8 - 8 read/write/exec [ anon ]
E38FE000 16 16 - 16 read/write/exec [ anon ]
E39F6000 48 48 - 48 read/write/exec [ anon ]
E3AFA000 32 32 32 - read/write/exec [ anon ]
E3BF8000 40 40 16 24 read/write/exec [ anon ]
E3CFA000 32 32 16 16 read/write/exec [ anon ]
E3DFA000 32 32 32 - read/write/exec [ anon ]
E3EFA000 8 8 - 8 read/write/exec [ anon ]
E3EFE000 16 16 - 16 read/write/exec [ anon ]
E3FF8000 40 40 40 - read/write/exec [ anon ]
E40FA000 8 8 - 8 read/write/exec [ anon ]
E40FE000 16 16 - 16 read/write/exec [ anon ]
E41F6000 48 48 40 8 read/write/exec [ anon ]
E42FA000 32 32 32 - read/write/exec [ anon ]
E43F6000 48 48 - 48 read/write/exec [ anon ]
E44F8000 40 40 - 40 read/write/exec [ anon ]
E45F8000 40 40 32 8 read/write/exec [ anon ]
E46FA000 8 8 - 8 read/write/exec [ anon ]
E46FE000 16 16 - 16 read/write/exec [ anon ]
E47F8000 40 40 16 24 read/write/exec [ anon ]
E48FA000 32 32 24 8 read/write/exec [ anon ]
E49F8000 40 40 16 24 read/write/exec [ anon ]
E4AFA000 8 8 - 8 read/write/exec [ anon ]
E4AFE000 16 16 - 16 read/write/exec [ anon ]
E4BFA000 8 8 - 8 read/write/exec [ anon ]
E4BFE000 16 16 - 16 read/write/exec [ anon ]
E4CF6000 48 48 40 8 read/write/exec [ anon ]
E4DF6000 48 48 - 48 read/write/exec [ anon ]
E4E80000 720 112 112 - read/shared dev:85,6 ino:2414099
E4F80000 1616 16 16 - read/shared dev:85,6 ino:2604124
E5180000 584 24 24 - read/shared dev:85,6 ino:2604127
E5280000 560 32 32 - read/shared dev:85,6 ino:2604145
E5380000 504 16 16 - read/shared dev:85,6 ino:2604133
E5480000 1776 40 40 - read/shared dev:85,6 ino:2604140
E5680000 1120 56 56 - read/shared dev:85,6 ino:2604138
E5800000 277504 277344 268008 9336 read/write/exec [ anon ]
F9900000 752 8 8 - read/shared dev:85,6 ino:899745
F9A80000 8 8 - 8 read/write/exec [ anon ]
F9B7C000 24 24 16 8 read/write/exec [ anon ]
F9C00000 9280 8944 8760 184 read/write/exec [ anon ]
FBC50000 8 8 8 - read/shared dev:85,6 ino:2414079
FBC60000 16 16 16 - read/shared dev:85,6 ino:2414042
FBC70000 24 24 24 - read/shared dev:85,6 ino:2414043
FBC80000 440 32 32 - read/shared dev:85,6 ino:2604129
FBD80000 8 8 - 8 read/write/exec [ anon ]
FBD90000 8 8 - 8 read/write/exec [ anon ]
FBDA0000 56 56 56 - read/exec libnet.so
FBDBC000 16 16 16 - read/write/exec libnet.so
FBDD0000 176 16 16 - read/shared dev:85,6 ino:2604126
FBE80000 8 8 - 8 read/write/exec [ anon ]
FBE90000 128 8 8 - read/shared dev:85,6 ino:2604148
FBEC0000 216 8 8 - read/shared dev:85,6 ino:2604125
FBF7A000 32 32 24 8 read/write/exec [ anon ]
FBF90000 416 8 8 - read/shared dev:85,6 ino:2604128
FC000000 5696 8 8 - read/shared dev:85,6 ino:1450986
FC5A0000 344 40 40 - read/shared dev:85,6 ino:2604131
FC67A000 32 32 24 8 read/write/exec [ anon ]
FC690000 24 24 24 - read/exec libpthread.so.1
FC6A6000 8 8 8 - read/write/exec libpthread.so.1
FC6B0000 304 40 40 - read/shared dev:85,6 ino:2604144
FC780000 8 8 - 8 read/write/exec [ anon ]
FC7A0000 352 24 24 - read/shared dev:85,6 ino:2604147
FC800000 23464 16 16 - read/shared dev:85,6 ino:1451026
FDEF0000 8 8 8 - read/exec libw.so.1
FDF00000 192 24 24 - read/shared dev:85,6 ino:2604142
FDF40000 96 8 8 - read/shared dev:85,6 ino:2604134
FDF60000 240 40 40 - read/shared dev:85,6 ino:2604157
FDFA0000 360 352 352 - read/write/exec [ anon ]
FE000000 4032 2472 2472 - read/exec libjvm.so
FE3F0000 128 128 88 40 read/write/exec libjvm.so
FE410000 56 56 48 8 read/write/exec libjvm.so
FE430000 32 32 32 - read/shared dev:85,6 ino:2604137
FE440000 208 40 40 - read/shared dev:85,6 ino:2604135
FE480000 544 544 328 216 read/write/exec [ anon ]
FE520000 8 8 8 - read/write/exec [ anon ]
FE530000 32 32 32 - read/shared dev:85,6 ino:2604146
FE540000 16 16 16 - read/shared dev:85,6 ino:2604123
FE550000 40 16 16 - read/shared dev:85,6 ino:2604139
FE560000 56 - - - read/shared dev:85,6 ino:899744
FE580000 152 152 152 - read/write/exec [ anon ]
FE610000 112 8 8 - read/shared dev:85,6 ino:899742
FE630000 32 32 24 8 read/write/exec [ anon ]
FE660000 72 - - - read/shared dev:85,6 ino:1450975
FE680000 872 8 8 - read/shared dev:85,6 ino:1450985
FE760000 8 8 8 - read/shared dev:85,6 ino:2604132
FE770000 88 16 16 - read/shared dev:85,6 ino:1450974
FE790000 64 64 64 - read/exec libzip.so
FE7A0000 8 8 8 - read/write/exec libzip.so
FE7B0000 8 8 - 8 read/write/exec [ anon ]
FE7C0000 136 136 136 - read/exec libjava.so
FE7F2000 8 8 8 - read/write/exec libjava.so
FE802000 8 8 8 - read/write/exec [ anon ]
FE904000 8 8 8 - read/write/exec [ anon ]
FEA06000 8 8 8 - read/write/exec [ anon ]
FEB08000 8 8 8 - read/write/exec [ anon ]
FEC0A000 8 8 8 - read/write/exec [ anon ]
FED0C000 8 8 8 - read/write/exec [ anon ]
FEE0A000 8 8 8 - read/write/exec [ anon ]
FEE0E000 8 8 8 - read/write/exec [ anon ]
FEF0C000 8 8 - 8 read/write/exec [ anon ]
FEF10000 8 8 8 - read/write/exec [ anon ]
FF00E000 8 8 8 - read/write/exec [ anon ]
FF020000 88 88 88 - read/exec libverify.so
FF046000 8 8 8 - read/write/exec libverify.so
FF050000 16 16 16 - read/shared dev:85,6 ino:899743
FF060000 40 40 40 - read/exec libhpi.so
FF07A000 8 8 8 - read/write/exec libhpi.so
FF07C000 8 - - - read/write/exec libhpi.so
FF090000 16 16 16 - read/exec libmp.so.2
FF0A4000 8 8 8 - read/write/exec libmp.so.2
FF0B0000 224 104 104 - read/exec libm.so.1
FF0F6000 8 8 8 - read/write/exec libm.so.1
FF100000 576 576 576 - read/exec libnsl.so.1
FF190000 40 40 32 8 read/write/exec libnsl.so.1
FF19A000 24 16 16 - read/write/exec libnsl.so.1
FF1B0000 8 8 8 - read/exec libsched.so.1
FF1C2000 8 8 8 - read/write/exec libsched.so.1
FF1D0000 8 8 - 8 read/write/exec [ anon ]
FF1E0000 40 40 40 - read/exec libsocket.so.1
FF1FA000 8 8 8 - read/write/exec libsocket.so.1
FF200000 688 688 688 - read/exec libc.so.1
FF2BC000 32 32 8 24 read/write/exec libc.so.1
FF2D0000 48 48 48 - read/exec libCrun.so.1
FF2EA000 8 8 8 - read/write/exec libCrun.so.1
FF2EC000 16 8 8 - read/write/exec libCrun.so.1
FF300000 16 16 16 - read/write/shared dev:0,2 ino:7595433
FF314000 8 8 8 - read/write/exec [ anon ]
FF320000 8 8 8 - read/write/exec/shared [ anon ]
FF330000 8 8 - 8 read/write/exec [ anon ]
FF340000 8 8 - 8 read/write/exec libdl.so.1
FF350000 112 112 112 - read/exec libthread.so.1
FF37C000 8 8 - 8 read/write/exec libthread.so.1
FF37E000 48 48 - 48 read/write/exec libthread.so.1
FF390000 8 8 8 - read/exec libc_psr.so.1
FF3A0000 184 184 184 - read/exec ld.so.1
FF3DE000 8 8 - 8 read/write/exec ld.so.1
FF3E0000 8 8 - 8 read/write/exec ld.so.1
FFB70000 24 - - - - [ anon ]
FFBD6000 104 104 96 8 read/write/exec [ stack ]
total Kb 986752 936008 905624 30384

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More ram than specs call for

Specs for my emac specify support for 1GB of ram. In searching for additional ram (I presently have 512MB) I have found some suppliers that claim you can install 2GB (1GB in each of the two slots). I called and they said they have tested this and it works fine. I consider the company I called to be reputable. Has anyone heard of this? What would be the downside of trying it out - other than the extra cost? Is there some kind of power limitations or something that might harm my computer?
Thanks for any insight,
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Ya if you do a search of this group, you will find this has come up a LOT of times and yes your Mac can use more RAM than 1GB if you want.
JIMacG5 I think is being a bit paranoid since, A) your eMac is probably long out of warranty anyway and B) Apple only tests up to whatever RAM was available at the time the model was in production. They do not test RAM for old models so many old models have outdates RAM specs and can use a lot more than they "officially" state they do.
Patrick

All things being equal, does 4th gen quad core i7 (2.5GHz) need more RAM than 5th gen dual core i5 (2.7GHz) for same tasks?

Bought mid/late 2014 15" MBPr with the i7 2.5GHz and 16GB RAM. I'm within 2 week exchange period at Best Buy, and thinking of switching to 2015 13" MBPr with i5 2.7GHz and 8GB RAM for battery life and weight, and they don't offer the upgraded 16GB RAM option for any 13" models.
Needs to be Best Buy because of gift cards
Use docked at office 75% of time vs 25% out of office, so portability and battery life are nice to have but not as important as if I had 8 hour flights on weekly basis
See appeal of having 5th gen i5 in 13" vs my 4th gen i7 that will be updated this summer
Not a gamer and don't use Final Cut or other video editing, but I tend to leave several applications open and usually have between 1-3 GB free RAM of the 16GB total at any time according to my Memory Cleaner readings
Therefore, worried that 8GB is a non-starter as simple math says that I would have shortfall of 5-7GB RAM based on above readings, but wondering if dual core i5 will use RAM more efficiently than quad core i7
Any help greatly appreciated!

Also to note, would like this to last 4 years, which was reason that I bought the higher spec'd model even though I don't run games or video editing

MBP Memory Upgrade Using More RAM than Before

Hey,
I have a 13-inch, late 2011 Macbook Pro with a 2.8 GHz Intel Core i7 Processor. I recently changed my 4GB memory (2 modules) PC3-10600 DDR3 1333 MHz to a Crucial 16GB PC3-10600 DDR3 1333 MHz.
Before the upgrade, the activity monitor would show memory used at around 3.98GB or so, and I was running only chrome with a few tabs open. Using chrome and a few more apps would slow down the computer significantly, though still usable.
After the upgrade, the activity monitor shows memory used at around 6.5GB with the same apps running (just chrome). My computer does run a faster and can handle a lot more apps.
My question is, why is my Macbook using more RAM after the upgrade?
Thanks,
Sebs

The short answer is that memory unused is memory wasted.
Mavericks is designed to decrease reliance upon mass storage, which is orders of magnitude slower than RAM. Mavericks will use all the memory available to it before resorting to using the swapfile. You are likely to find "swap used" to be zero, even with Google Chrome's notoriously profligate use of system resources.
Read: OS X Mavericks: About Activity Monitor

Can I add more ram than suggested

I need to get some more ram for my imac that apple say I can expand to 16gb. I currently have the standed 4gb.
In the following article from pcworld i noticed the following (especially the bold)
All iMacs come standard with 4GB of memory, installed as a pair of 2GB modules. When you order an iMac through the Apple Online Store, you have the option to upgrade the memory to 8GB (a pair of 4GB modules) on all iMac models for $200, or to 16GB (four 4GB modules) on the 27-inch models for $600. The iMac has four memory slots located at the bottom of the iMac that are user-accessible. Since two slots are empty when you buy an standard-configuration iMac, you can easily add more memory. The 21.5 inch iMac has support for up to 16GB of memory; third party companies are offering 32GB memory upgrades for the new 27-inch iMac.
Does this mean that I can technically go up to 32gb? Is there a down side to adding more the an 16gb suggested.

Although you can install up to 16 GBs of RAM in both 21 and 27" models, I can not confirm that you can install 32 GBs in the 27" model. You might check OWC to see what they say.

Why Yosemite used more ram than maverick?

After installing Yosemite 10.10, the system used 80% of ram after I streamed serials with Safari. Meanwhile, when I was using it from Maverick, the system only used 50% of the memory.As I typed this, the RAM usage significantly increasing. Please fix this issue of RAM usage. Thanks
I'm using Macbook Pro Retina (13" late 2013)
Ram 8GB

How did you transfer the backup? It sounds like you may have transferred more or less than you should have, which is causing you problems now. Mountain Lion's memory requirements should be about the same as Lion's.
Note that your problems may or may not be RAM-related. Don't be too concerned about low free RAM... free RAM is wasted RAM, and low free RAM should not be a problem in and of itself. If you have low inactive RAM in addition to low free RAM, though, or if your page outs value in Activity Monitor is too high (10% or more of page ins), then it's probably RAM-related.
Still, you definitely should be able to run the same tasks on newer hardware in Mountain Lion just as well as you did in Lion, on the same amount of RAM. If that's not the case, something's wrong and some troubleshooting will be needed. You could try some of the tips in my Mac Performance Guide, though there may be some more specific steps you can take based on the answer to my initial question.

I have more ram than about my mac shows...

I just updated from 10.4.6 to 10.4.9 after bringing my computer home from the studio to hook it up to the internet. When I updated to 10.4.9, I went to about this mac from the apple menu, and it showed 10.4.9, dual 2.5 powermac g5, and 3.5 gb of ram. But I have 4gb of ram. I have 4 1gb ram modules. Unless, I opened it up and didn't see 4 other ram modules in there.
I'm not sure why the OS update would cause 512mb of ram to disappear. I read another post where someone mentioned the ram not showing correctly in about this mac and having to replace the logic/motherboard. I don't know why that would coincide with an update, unless it was just bad timing.
I also had to move the system and thought maybe a ram module got jostled loose in the ride over. Are there four ram slots in the powermac g5 2.5 or eight? Could there be a loose 512mb module?
Please help.
powermac g5 2.5ghz dual Mac OS X (10.4.9) updated from 10.4.6 and this happened.

See http://support.apple.com/specs/powermac/PowerMacG5.html for details or read the manual that came wtih the machine. If you don't have one, download the appropriate one from http://www.apple.com/support/manuals/powermac/

PS CS4 consumes a lot more RAM than CS3

I recently updated from Photoshop CS3 to Photoshop CS4 and now I have the problem that CS4 is consuming very much RAM.
When I open the same image on both versions CS4 consumes like four times as much RAM as CS3 does.
Settings are identical on both versions, so I don't quite know how this can be.

TheARchitect2009 wrote:
As an example: In idle, without any file loaded, CS3 uses around 90MB while CS4 uses 380MB.
I don't run CS4 on Windows (just CS3) so I can't say whether is this normal behavior. That sadly may be simple application bloat. I was also shocked to see Vista using 1 GB of RAM when idle and without running apps.
Make sure your RAM allocation and history state settings are consistent between the versions.

MSI Big Bang-XPower II More MB RAM than the CPU can handle...

I understand reading in a few forum post :" By making more memory available to the system more data can be cached in RAM, so there will be less hard drive activity, and less swapping to memory so your system will perform better." But what happen when motherboard for a desktop that supports( and had install) more RAM than the processor can handle?(aka:processor Max Memory Size).
Please comment in this configuration.as I 'm looking for a MB than offer me the more SATA6 connection i found a few available using LGA2011 socket (MSI Big Bang-XPower II LGA 2011 Intel X79 SATA 6GB/s USB 3.0 XL ATX Intel Motherboard with UEFI BIOS) than support 128GB. As I understand the processor Intel® Core™ i7-3930K Processor only work with 64GB.
Is there any advantage to have a MB that hold a bigger RAM capacity than the CPU? If so, how can this be translate using in a program like Adobe After Effects, RAM preview? thank

More Memory doe's not make it faster as its Volatile Memory (more RAM but it has to be run at much slower speeds) that is very short term and is just a buffer for active Programs and files it Caches there while its active but in no way improves system speed (as it has to be clocked slower to allow the IMC on the CPU to cope with it)! more memory just allows more Active Large programs and files open at the same time and huge amount of ram will only really be of benefit for things like Video Editing, photo editing and 3D rendering as those take alot of ram to allow all the computations that the CPU does to be held for quick access but only when they are active!
having more RAM then your CPU can Handel is a VERY BAD IDEA as it will just refuse to even post or in very rare cases damage the CPU's IMC leading to a dead CPU!
why MSI have done that is for possible later 2011 CPU's that may allow the 128GB of RAM limit to be used but currently they do not exist currently as X79 is a more professional grade Platform that will probably be around for years to come (may be used for many upgrade cycles and may eventually have a cpu that can use 128GB or ram) and who knows what will happen with Intel CPU's in that time frame! (more of a possible forward compatibility thing as its a very high end platform)
as for after effects it uses RAM for holding Render Files so in theory more ram will just allow it to render Larger files that are more complex without hitting the Available Ram ceiling that your computer has but it will not render any faster as a result it just gives it more headroom to work in!
so overall more ram = more Active space available & no increase in speed (actually maybe a drop in speed as it needs to run slower causing LAG/Latency) so it all depends what is important to you here to whether more ram is of any benefit or just a hindrance but that is down to your own use case scenario!

Aging g4 just keeps going but is more ram worthwhile?

I have a g4 that was purchased in 2000. I have never had a problem with it and probably haven't turned it off 50 times since I bought it. My question is that I can't afford a new computer but is it worth putting more RAM in it now in view of it's age? I run heavy apps on it (i.e., adobe and open-source). Currently I have 756 total RAM. My understanding is that with OS X I can go as high as 2GB so is it worth it? I know I have been extremely lucky with how this computer has performed.
The only other option I might consider is a Mac Mini with 4GB of RAM but everything I've read says that this is not a "production" machine. I am a graphic/web designer so performance is important (yeah, I know, so why am I using a dinosaur?).

Hi, helloiamamac -
There's no factual way to answer that question, only opinion.
When using OS 9, since you already have more than 512MB of RAM, adding more will not help much, as long as you are not running out of RAM under your current usage patterns. If you had less than 512MB, you could see (subjectively) an improvement in OS 9 by adding more. OS 9 can address a max of 1.5GB of RAM.
If you are using OSX, then adding more can help, specifically by reducing or eliminating the need for the OS to use swap space on the disk (a form of virtual memory). No data is read faster than data in RAM. Although fast processors (which you do not have) can manage swapping data from disks much better, it's still not as fast as reading from RAM. OSX can address a max (on your machine) of 2.0GB of RAM.
That machine, a G4 (Gigabit Ethernet) model, has four RAM slots (it was the last machine prior to the G4 MDDs which has more than three slots); each slot is rated for a max RAM module size of 512MB. Four of those give the machine's max total of 2.0GB.
You stated your machine has "756 total RAM" - might that be 768MB instead? 768MB is usually the result of one 512MB module and one 128MB module, although it could also be three 256MB modules (or some other combo of modules). In order to get 2.0GB of RAM in it, the minimum number of 512MB modules you would need is three; the max is four. You would need to balance the cost of those vs. the cost of a newer machine, one with more RAM than you have now.
By "newer" machine I am suggesting that instead of a brand new machine, you look at ones older than new, but newer than yours. Some of the G4 MDDs are going for good (i.e., low) prices, perhaps even lower than the cost of adding RAM to your machine. G5s are another possibility, provided you do not need to boot to OS 9.

Does 64 bit Windows see more RAM then the 32 bit version under Boot Camp?

To be or not to be....
I've found many useful hints on boot camp/ windows/ RAM correlations but none on this question, grateful for any idea?
paul

Your question has been answered many times in the Boot Camp forum. https://discussions.apple.com/community/windows_software/boot_camp
32 bit Windows can address 2^32 addresses. 64 bit Windows can address 2^64 addresses. There are some limitations for 64 bit Windows depending on the version. But yes, 64 bit Windows addresses far more ram than do the 32 bit versions of Windows. So if your computer has more than 4GB of ram, you must use the 64 bit Windows in order to use all your ram.
Search using Google and you will find many more articles explaining the differences between 32 and 64 bit Windows.

More RAM for my MacPro

Hi,
Is it possible to get more RAM than 8 Gigs on a Single Quad-Core Intel Xeon Mac Pro?
I bought mine fully loaded about 4 months ago but I see now that you can go up to 16 Gigs on the brand new MacPro, as being advertized recently on the Apple Store Web Page.
If so, do I have to change the Logic Board or add/by another card of somme nature? Is there any third party resellers who does it?
Thanks
RM

You have one option, pull (and sell) your 8GB and install 4 x 4GB.
http://eshop.macsales.com/shop/memory/Mac-Pro-Memory

Will more RAM help NVIDIA?

I am thinking about a new imac 21.5 to replace G5 17. Not a gamer or music user but do photos and occasional home video.
Will more RAM than 4 GB for NVIDIA to share with the CPU speed up graphics to an appreciable extent?
Or should I just bite the bullet and go for the upgraded graphics card, providing I will ever notice the difference.

Jim,
Look at the data http://marketingtactics.com/Speedmark/
You new iMac will be about 2.5x the power of your current G5 iMac.

Snow Leopard uses more RAM?

I just installed Snow Leopard on my MacBook Pro and found that RAM usage is obviously a lot more than 10.5 when my system is not running any demanding programs at all. With only Mail, Safari and iTunes running, RAM usage is already more than half of my 3GB RAM, which is the maximum for my 2.33Ghz MacBook Pro. I've heard some people say that to use 10.6, you need at least 4GB RAM to make your system really meaningfully workable. Is that true? Is it really true that 10.6 itself uses more RAM than 10.5?

If you've got the ram, SL will use it. It's supposed to be that way. Reading files from a hard drive really can't keep the OS running as fast as the other hardware can provide. New program features don't work as well with limited ram.
I think that every new OS uses more ram than it's predecessor (same for Windows). Snow Leopard may take less hard drive space, but part of that is because code for PPC Macs has been removed.
Every time a program has to use a hard drive to store part of it's code it's running too slow. I look forward to new memory management techniques that will allow for immediate use of the computer, but still continue to load itself into all the ram it can use. Some of this is already happening, but it will get even better.
As the CPU's get faster, and the memory management systems become more powerful I expect to be able to use even more ram in the future. My 3 year old MBP also has a 3GB limit, but my iMac supports 8 GB of much faster ram. I don't expect to be doing the same type of work with my laptop which shipped with Tiger as I do with the iMac and will probably sell the older laptop in another year to offset part of the cost of the next killer MBP.
Typically I need the MBP to run Windows at a clients site, and XP with 1GB assigned in Parallels has been good enough. Soon I'll need to run Windows 7 on a regular basis, and it requires 3 or 4 times as much ram as XP to get the best performance, plus the IC2D processor can use an update with a couple more cores
Ram is still the cheapest way to help a computer perform at it's best, so when I can, I add all the ram a machine can use and expect changes in the OS and programs to eventually 'obsolete' my machines every 3 to 5 years. I say obsolete because I tend to voluntarily upgrade to the latest hardware and programs when the prices taper off a little.
We are only seeing the beginning of what Snow Leopard can do. The more powerful programs aren't really ready for SL's performance enhancements yet, but as they come online in the next year or so I think they'll take advantage of even more ram...
Meanwhile, there aren't any programs that really require SL and there are still a few that won't work well or at all. Leopard worked very well on my laptop.

KDE 4.4 eating up more RAM than 4.3

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