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

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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.
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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).
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Last edited by rune0077 (2010-02-13 17:01:39)

JVM takes more RAM than defined in -Xmx param on solaris

Hi all,
We have a problem on production installation of our product on Solaris paltfroms: jvm takes more (much more) RAM than defined in -Xmx param and without any OutOfMemory exceptions. (how itt possible at all ?)
The only JNI call in application is SAP interface connector, but application uses a lot of Runtime.exec() calls.
Is it possible to have such kind of "leaks" in java using JNI or Runtime.exec()?
I will be very appreciate for any tip how to find the root of this problem and how we can fix it ?
//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 ]
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DC778000 16 16 8 8 read/write/exec [ anon ]
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DCB7A000 8 8 8 - read/write/exec [ anon ]
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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 ]
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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 ]
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E0C78000 40 40 32 8 read/write/exec [ anon ]
E0E7A000 8 8 8 - read/write/exec [ anon ]
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E1076000 48 48 48 - read/write/exec [ anon ]
E117A000 32 32 32 - read/write/exec [ anon ]
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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 ]
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E1C7A000 32 32 16 16 read/write/exec [ anon ]
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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

See http://java.sun.com/j2se/1.5/pdf/jdk50_ts_guide.pdf and look into using libumen on Solaris.
-kto

Any chance of allowing FCPX to use more RAM?

Hi everyone!
Is there a chance of allowing Final Cut Pro X to use more RAM? It seems to use about 10-20% of the 16 GB of my MacBook Pro: even after quitting all the other apps. The speed result on rendering, transcoding and exporting is quite slow. And the activity monitor shows that the mac using very little of its resources, as shown below, during the process of exporting a 30' movie:
Many thanks in advance!

OK, the processes you specifically mention are also heavy GPU processes, which Activity Monitor doesn't report. A MacBook Pro does not have the most powerful GPU around, either.
And, the codec you're exporting to will matter a great deal, as mentioned. Long-GOP will take much, much longer than all I-Frame codecs.
As for Handbrake, it only uses the CPU, so you will see at least one core (100%) of your multicore CPU in use. FCPX and Motion use the GPU, which reduces useage of the slower CPU.
As for you recent post, we are not mind readers, we have no idea what your experience level is. And using the software as a professional does not mean you have professional level IT experience or training. Personally, I am a retired IT engineer, and know most pro-users of software lack a great deal of IT knowledge/experience. No one here has said anything demeaning, we're just here to help as best we can. If you take offence, well, if you ask a question, you're going to get a range of answers, and all from people who's only purpose here is to be helpful. Sorry if you took offense from those of us trying to help. But you are stating you don't understand, and we're giving the technical information necessary to answer. Plain and simple, no insults have been posted.

Has anyone else noticed firefox using more RAM in windows 7?

I've noticed this lately and firefox has been using more RAM lately. I only have 1 tab open and it doesn't matter what page I would be on when it happens. It wouldn't bother me if I still had 6GB of RAM but I am going on 3.5 now. Can you guys fix this please? Just being on this page alone it's at 2.15GB when it would usually be at 1.78 and in processes it says 260,000k. I don't have any other windows or tabs open.

All is good now :D

Does tethering my iPad to my iPhone 4s use more data than using an iPad that has its own data plan?

Does tethering my iPad to my iPhone 4s use more data than using an iPad that has it's own data plan?

No, it won't work.. the Airports are not media devices.. they have no brains .. no media extensions.. and itunes must be running on a computer.
You can however watch movies from storage but not with itunes..
See how people use tools like VLC to get around Apple's built in iTunes limitations.
http://www.videolan.org/vlc/download-ios.html
https://itunes.apple.com/gb/app/vlc-streamer/id410031728?mt=8

Firevault: "Your homefolder is using more space than required"

I would like to ask for some help. After every log-out, Firevault tells me that "Your homefolder is using more space than required" (or something between that lines). What can I do?
Thank you for the help.

Hi Morales,
Unless you have a need for military-level security, FileVault is overkill. It slows your computer because all sorts of cache and preference files are repeatedly encrypted and decrypted, and because filevault is saving all your files in a big "container file," disk and directory errors that would otherwise be minor can cause massive data loss on a filevault-ed computer.
To keep SOME files secure, an encrypted, password protected disk image is a better idea. You can make encrypted disk images with Applications/Utilities/Disk Utility. Do File > New > Disk Image from Folder.
John

Every time I upgrade packages, system uses more RAM

Hello
As the topic says, Since my last system update, after a normal boot, the system consume about 60 to 70 MB of ram on buffered, and more that 100 at the first line when I run "free" command, against the half part used before.
Is it normally? kernel load more modules? or, new modules are bigger than before? because I don´t have new hardware on my tower?
Waiting comments...

You post is not all that clear to me....
However, when you run free it shows all the ram that is being used by applications and that are being cached. If you look at htop it will show you how much memory is being used by applications and programs.
You can get htop form extra. You could find the value via /proc/meminfo and do (MemTotal - MemFree) - (Buffers - Cached) = Total Memory in use by applications. If you don't understand this just use htop

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

Mid 2010 17" MBP Memory Upgrade - Aftermarket Performance/Compatibility?

Looking at a mid 2010 17" Macbook Pro, and want to buy with 4GB, then upgrade to 8GB after.
I see some posts about machine issues after memory upgrades.
are there any brands of Memory to avoid?
I was looking on Kingston's site and on Macsales.com
anyone know which brand Apple uses in this Macbook Pro?
Recommendations?

As I said any brand will work just as well as any other brand, so the brand is irrelevant which you buy. All types of RAM are known to work. None any better than any other. This includes whatever brands Apple uses. As long as the RAM has a lifetime warranty and you buy from a vendor with a good return policy then you are in good shape.
If you look for the research you will find that tests of different brands of RAM demonstrated that the brand is unimportant when choosing a product.
I've never purchased brand name RAM in over 20 years for more than 30 Macs I've owned, and I've never had a problem. I happen to purchase mine from Data Mem.

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.

MBP Memory Upgrade Using More RAM than Before

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