Insufficient space for shared memory file 磁盘空间不足

线上服务器运行时突然停止了，而且访问这台服务器的界面很卡，而且停止服务器时遇到如下问题：



Insufficient space for shared memory file

首先咨询百度翻译，意思是：共享内存文件空间不足。
提示文件空间不足，而恰巧我们的程序涉及到文件的上传。
那么肯定是文件存储的磁盘空间不足。
使用df查看一下文件存储的磁盘的利用率，已然达到了100%。如下：



好吧，咨询了一下专业的人士，他将不要将tomcat放在 /usr/local下面，因为 /usr/目录与/home目录共用一个磁盘分区，而且分区比较小。
建议将服务器放到/app目录下。/app是专门存放应用的路径。

附录：
下面是一些linux查看磁盘的命令演示：
[root@yjyapp ~]# df -m
Filesystem 1M-blocks Used Available Use% Mounted on
/dev/vda2 50397 25763 22075 54% /
tmpfs 7976 1 7976 1% /dev/shm
/dev/vda1 194 34 151 19% /boot
/dev/vdb 201587 188 191160 1% /file
/dev/vdc 503967 944 477423 1% /app

[root@yjyapp ~]# fdisk -l

Disk /dev/vda: 64.4 GB, 64424509440 bytes
16 heads, 63 sectors/track, 124830 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000edfae

Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *           3         409      204800   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2             409      104434    52428800   83  Linux
Partition 2 does not end on cylinder boundary.
/dev/vda3          104434      121078     8388608   82  Linux swap / Solaris
Partition 3 does not end on cylinder boundary.

Disk /dev/vdb: 214.7 GB, 214748364800 bytes
16 heads, 63 sectors/track, 416101 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/vdc: 536.9 GB, 536870912000 bytes
16 heads, 63 sectors/track, 1040253 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

[root@yjyapp ~]# df -lh
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda2        50G   26G   22G  54% /
tmpfs           7.8G  264K  7.8G   1% /dev/shm
/dev/vda1       194M   34M  151M  19% /boot
/dev/vdb        197G  188M  187G   1% /file
/dev/vdc        493G  944M  467G   1% /app

[root@yjyapp ~]# df -lh /home/uploadfile/
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda2        50G   26G   22G  54% /

查看当前目录下各文件夹所占内存及总内存[root@oadev weaver]# du -ah --max-depth=1
1.1G ./workspace
47M ./e-message客户端
299M ./jdk1.7.0_79
1.4G ./EMobile_bak
234M ./jdk1.6.0_27
4.0K ./lost+found
808M ./Resin
27M ./e-message
86M ./EMobile
1.3G ./ESearch
1.8G ./ESearch_bak
92G ./ecology
264K ./diffver
98G .