Questions tagged [huge-pages]

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0answers
35 views

Pmem and huge pages

In my Ubuntu 18.04 Intel system, there are 356gb of DDR. Out of this memory, 300gb, are pre-allocated using the pmem mechanism (since we have an external HW that sends us contiguous data chunks of ...
-1
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1answer
94 views

why it so important do disable THP ( transparent huge pages ) on database servers? [duplicate]

We have hadoop cluster We notice that on many DB servers, that the THPs are disabled ( include HDFS servers ) Can you explain why it is so important to disable THP on DB servers? what could be if ...
2
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0answers
20 views

Allocate pools of hugepages separately on each NUMA doamin

On my dual-socket machine, I'm trying to allocated two pools of hugepages (one for each socket), so that the application A, which is pinned on the first socket, uses the first pool, and the ...
0
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0answers
91 views

Run Qemu VM as a User (non root) / DMA mapping failed

When i trying to run my windows VM as non-root i get this message sudo ./win10vmuser.sh (qemu) qemu-system-x86_64: VFIO_MAP_DMA: -12 qemu-system-x86_64: vfio_dma_map(0x555dd67af690, 0x90000000, ...
1
vote
1answer
261 views

Which distributions enable transparent huge pages “for all applications”?

I am puzzled by LWN again. Huge pages, slow drives, and long delays -- LWN.net, 2011 It is a rare event, but it is no fun when it strikes. Plug in a slow storage device - a USB stick or a ...
0
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0answers
67 views

php, opcache and linux huge pages

I'm using php-fpm configured to use file cache like this (php.ini): opcache.enable=1 opcache.file_cache=/var/lib/hugetlbfs/group/www-data/pagesize-2MB opcache.huge_code_pages=1 and by using debug....
4
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0answers
271 views

Understanding main memory fragmentation and hugepages

I have a machine that is intended for general use and which I also used to run a QEMU virtual machine. Because the virtual machine should be as performant as possible, I want to back the VM memory ...
0
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0answers
25 views

Linux reproduce error about Transparent Huge Page

I've been doing stress test to check if some process stall error comes out once memory got high load (THP)Transparent Huge Page is enable. I want to reproduce the error 'Random 'stalls' ocurring ...
1
vote
1answer
243 views

Error configuring large page support on Centos 7 VPS

I am trying to mine Monero with my VPS, but I encountered an error when trying to enable large pages support. The miner I am trying to use is XMR STAK CPU, but I do not believe this to be the issue, ...
1
vote
0answers
134 views

Discover huge page support on POSIX or Linux

I'm working on a program which needs to detect at runtime whether the system it's running on supports hugepages, and if so, what sizes are available. Ideally I'd like this to work for any POSIX ...
0
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1answer
2k views

Zend OPcache huge_code_pages: madvise(HUGEPAGE) failed

I've got this error while running a PHP command-line script on a freshly installed server: PHP Warning: Zend OPcache huge_code_pages: madvise(HUGEPAGE) failed: Invalid argument The server is ...