Our team makes a software in Java and because of technical reasons we require 1GB of memory for the JVM (with the Xmx switch).
If you don't have enough free memory the app without any sign just exits because the JVM just couldn't bite big enough from the memory.
Many days later and you just stand there without a clue as to why the launcher does nothing.
Then you remember this constraint and start to close every memory heavy app you can think of. (I'm looking at you Chrome) No matter how important those spreadsheets or illustrator files. Congratulation you just freed up 4GB of memory, things should work now! WRONG!
But why you might ask. You see we are using 32-bit version of java because someone in upper management decided that it should run on any machine (even if we only test it on win 7 and high sierra) and 32 is smaller than 64 so it must be downwards compatible! we should use it! Yes, in 2019 we use 32-bit java because some lunatic might want to run our software on a Windows XP 32-bit OS. But why is this so much of a problem?
Well.. the 32-bit version of Java requires CONTIGUOUS FREE SPACE IN MEMORY TO EVEN START... AND WE ARE REQUESTING ONE GIGABYTE!!
So you can shove your swap and closed applications up your ass but I bet you that you won't get 1GB contiguous memory that way!
Now there will be a meeting about this issue and another related to the issues with 32-bit JVM tomorrow. The only problem is that this issue only occures if you used up most of your memory and then try to open our software. So upper management will probably deem this issue minor and won't allow us to upgrade to 64-bit... in 20fucking19

Me: hmmmm it's a pain in the ass building my program and having to rebuild it everytime I want to swap to my Chromebook (going from x86 to ARM64), I really wish they could develop an OS that is essentially a VM so you would compile once and have the OS' VM later do the heavy lifting

My brain: hey Alex, that sounds like a great idea, you deserve a coffee for that!

Me: yes I do... Wait... Coffee... Cup of jo... Java.... WAIT! This sounds like what Java was intended to be!!!!!

My brain: oh dear god... Time to fucking bury this thought to never be discussed again!!!!!

What's the lesson to learn here? If it looks like Java, sounds like Java and acts like Java, beat it over the head and bury it 6 feet down :-3

After being on devrant for a while, I've been inspired to move to Linux, and my desire to learn is making me consider Arch. My only issue is that I don't have a computer to swap OS', because there are some people who depend on my laptop when I'm not home (more on that another time, maybe), and they will have a fit if I switch. 😥

Anyone have any experience on booting from a external HDD (and not a stick)?

I would love to see the environment that the Mac OS X team works in.

Do they work in all cubicles? Is it more of an open space? Do they use the latest Macs? If so, do they use all Apple hardware? Or do they swap out keyboards/mice with ones that they prefer? Which secondary displays they use etc.

I just wonder if the professional Mac OS X developers actually use their Macs the same way that Apple wants their customers to use them.

## building my own router

I hoped things would go more smoothly :)
Anyway, my new miniPC easily accepted CentOS 8 - no fuss here. And I've got to say - I love CentOS8 so far! Shell has amazing nifty tricks, UI (gnome3) is also snappy, video/audio/ethernet,.. everything works.

What I did NOT expect is hardware being off. Well okay, the price was low - it was obvious smth is not right. But still.. I decided to build my own router so that I could swap wifi card whenever I want. So that I could run my own network services in there. Turns out - the card swapping is not as easy as one might think.

I got the AX200 WiFi6 card for that very purpose. But once plugged in the OS can only see it's bluetooth module. Weird... What's even weirder is that even though the card is PCIe, the OS uses btusb module to talk to that device. What? USB?? emm.. What??

And there it is. After opening it up again I noticed that the mPCIe area is marked with a label: "USB WIFI / WWAN". USB? Does that mean this PCIe slot is wired into the USB bus? Not impossible I guess.

Googling for a "pcie wifi over usb" or smth like that brought me to one reddit (I think?) where someone wanted to build a DIY wifi mPCIe -> USB adapter and someone else adviced hime that (for some reason) at best he could only get bluetooth working (hey! just like me!). It's got to do smth with pcie channels and USB being too weak to handle all that load, or smth.. IDK, I'm not a HW guy.

Well that sucks then! I have a mPCIe slot that does not work as a PCIe. Shit! So I guess the best I could do is to plug back in the same wifi card that came with the device. It smells like 2003 - supports only g protocol. Fine, let's try that. Maybe I'll find a way to work around this mPCIe limitation later on (USB adapter or smth... except there are no USB WIFI6 dongles yet :( ). So I plug it back in and start turning it into a router. Disable NetworkManager, configure static NCs' settings, install dhcpd, hostapd, bind and others. Looks like all is done! Now it's time to start it all. systemctl start hostapd --> FAILED. wtf? journalctl says it could not initialize a driver. umm okay? Why? Forums say I should airodump-ng check and kill whatever's using that device. Fine. airodumo reveals avahi and wpa_suppl are still using it. kill, kill, GOTTA KILL 'EM ALL!! Starting hostapd again -- same shit... wtf?

iw list

My gawd... That shitty network card does not even support AP mode :( I mean.. My USB wifi dongle for 2€ supports 2x more modes, is faster, has better range and is easier to work with than this old tart!

Yeah. That was an interesting day. When enfironment engineers break my testing environments at work I'm glad I have where to spend my time now.

BTW any ideas how to bypass this mPCIe nonsense? Come on, there are USB GPUs out there.. Why can't they make a USB (or dual-USB if they really need to) mPCIe adapter?

Ugh am so done with linux.

I dualbooted ubuntu 16.4 LTS alongside win10 on my new laptop 3 years ago. Back then , the whole os and kernel stuff were new for me, but once i understood how things work in it, i always found linux to be a superior alternative for doing any development related task than windows.
The way terminal gives us sheer raw power to handle services and applications ourselves makes everything easy in linux.

Wanna run a lamp server? Install all parts by yourselves. Problems with the lamp server? You are just 1 command away to know which service/package is causing issue. Some python module fucked up? You can go on checking every package present anywhere on your disk. No permissions? Sudo.

But recently i got so much fed up of its gui. I have gone from 16.4 to 18.4 to 20.4 , but no version seems to handle multiple gui s/w running parallely .
I usually have the requirement to open 2-3 windows of chrome with 30-40 tabs, 1-2 projects of Android studio and studio emulator. But this shit blows even with just 1 project open on studio and nothing else! The even the keyboard and mouse gets stuck when i studio is making a built.
And don't get me started on how slow my system becomes when switching b/w AS and chrome :''( . Maybe there's issue with the dual boot or because i gave very large swap/root partitions when i first dualbooted or something else , but i am in so much pain :/

Finally i went back to win10 a month ago and was a little surprised to find that it sucks a little less now. Aside from the ugly forceful updates, it has been a breeze for working . The builds take longer time (fuck windows defender), but My Android studio (and everything else) does not lag when switching between multiple processes. I even once ran an emulator instance and it was still working fine . The process management of windows is very good.

I have heard that mac is kind of in middle of the 2 and better than both providing rich process management and powerful terminal commands . Waiting for the day when i have enough money(or no longer require my kidney) to buy and maintain a MacBook :/

So I decided to install a third OS on my laptop and oh boy, I never thought I'd have to deal with so many issues!

First, I had to make space for the new OS, so I did the only feasible thing - Shrunk a windows partition (Used for gaming only), then installed the third OS into it. (For clarification, one OS was Windows, the second Debian for work and the new one was Kali for a course at school about security and ethical hacking)

Well... After I installed and tried out that the Kali worked... My Debian began to make problems. It would hang for almost a minute during start as it tried to mount a (for some reason) no longer existing Swap partition.

After it gave up and I found out... I, fortunately, fixed it after just a bit of googling. At least I learned to repack the ramfs.

It worked all fine and dandy... Only... My Debian now shared the swap with Kali.

Few weeks forward, last friday, I tried to boot up Kali at class... Only for it to... Stop at a black screen, weird.

Some minor detective work later, I found out nothing was... Wrong really.
But... For some mysterious reason, my complete GDM just.... No longer worked.

One LightDM and XFCE instal later (Thanks god that at least TTY still worked fine), it finally worked again, and this time, I booted back into Debian, shrunk the Kali partition a little more and dedicated it's own swap there. Setting and resetting everything, and finally had a working triple-boot laptop...

My only question is... Why?

Does sharing Swap really affect the system so much, besides hibernation ofc.

I often have to use files on Linux, Mac OS and Windows. I've had multiple issues trying to swap files across the platforms. Is there a solution I can use to replace USB storage? A dedicated server or something?

!rant
My home pc has developed a sudden issue and wont boot up anymore.

Stays stuck on the POST phase and am unable to get into BIOS , just stuck with a big asus logo and a message to press
F2 or Delete to get into BIOS but the system seems frozen as the keyboard lights are on but unresponsive while the
Mobo reads an error code A2
( the manual claims that to be an IDE error although am using only SATA)

Unplugging all usb doesnt change anything.

Unplugging all other sata ssd ,hdd and disk drives except the os drive changes nothing.

Unplugging the os drive results in the system complaining about no bootmgr
(As expected), that allows me to at least look at the BIOS but there doesnt seem to be anything wrong or out of the ordinary..

Booting from a live cd works fine

Booted from a pc boot repair tool and plugged in the os drive into one of the hot swappable sata ports shows me the all the files still there and accessible , check disk revealed nothing wrong. Can't plug in the os drive pre boot as that locks everything up again)

Tried to boot with a windows cd then do a start up repair but plugging in the os drive into the hot swappable sata doesn't work since windows can't see the drive.

Tried to swap the os drive with another one of exact same model filled witb random files resulted in no boot mgr error as expected

Struggled a whole weekend to fix it but alas no progress
Ah and the OS drive's warranty ran out 2 weeks ago 😑

Mobo asus p9x79 deluxe
Os ssd samsung 840 250 gb
No changes in hardware for the last year
Or so
No BIOS changes in over a year

I did notice some odd files like 0002Found
On the os drive when i was using the boot repair live cd tool, will bring the drive to
The office where i can get my hands on an ssd sata to usb caddy and take a snapshot of The files there for you guys to see.

Any ideas ? 😞