linux 清理core文件大小,在Linux上，2G是coredump文件的限制大小吗？
我的操作系统是Arch Linux。当有一个核心转储，我尝试使用gdb来调试它：在Linux上，2G是coredump文件的限制大小吗？
$ coredumpctl gdb 1621
......
Storage: /var/lib/systemd/coredump/core.runTests.1014.b43166f4bba84bcba55e65ae9460beff.1621.1491901119000000000000.lz4
Message: Process 1621 (runTests) of user 1014 dumped core.
Stack trace of thread 1621:
#0 0x00007ff1c0fcfa10 n/a (n/a)
GNU gdb (GDB) 7.12.1
......
Reading symbols from /home/xiaonan/Project/privDB/build/bin/runTests...done.
BFD: Warning: /var/tmp/coredump-28KzRc is truncated: expected core file size >= 2179375104, found: 2147483648.
我检查/var/tmp/coredump-28KzRc文件：
$ ls -alth /var/tmp/coredump-28KzRc
-rw------- 1 xiaonan xiaonan 2.0G Apr 11 17:00 /var/tmp/coredump-28KzRc
是2G在Linux核心转储文件的大小限制？因为我认为我的/var/tmp有足够的磁盘空间可供使用：
$ df -h
Filesystem Size Used Avail Use% Mounted on
dev 32G 0 32G 0% /dev
run 32G 3.1M 32G 1% /run
/dev/sda2 229G 86G 132G 40%/
tmpfs 32G 708M 31G 3% /dev/shm
tmpfs 32G 0 32G 0% /sys/fs/cgroup
tmpfs 32G 957M 31G 3% /tmp
/dev/sda1 511M 33M 479M 7% /boot
/dev/sda3 651G 478G 141G 78% /home
P.S. “ulimit -a” 输出：
$ ulimit -a
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 257039
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 257039
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
更新：/etc/systemd/coredump.conf文件：
$ cat coredump.conf
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# Entries in this file show the compile time defaults.
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# See coredump.conf(5) for details.
[Coredump]
#Storage=external
#Compress=yes
#ProcessSizeMax=2G
#ExternalSizeMax=2G
#JournalSizeMax=767M
#MaxUse=
#KeepFree=
2017-04-11
Nan Xiao
+0
你真的可以在文件系统上创建足够大的文件吗？ –
+0
@SergeiKurenkov：是的，我使用“dd if =/dev/zero = test bs = 1024 count = 4MB'”来创建一个4G文件。 –
+0
这里http://stackoverflow.com/questions/8768719/coredump-is-getting-truncated它建议也检查'ulimit -f' –