Question:
We are planning to calculate the percentage of physical memory utilised as below:
System Page Size: 4Kbytes
Memory: 5343128K (1562428K) real, 13632356K (3504760K) virtual, 66088K free Page# 1/604
Now the formula goes as below:
(free memory / actual active real memory) * 100
(66088/1562428) * 100 = 4.22 %
Please let us know if its the correct formula .
Mainly we are interested in RAM percentage utilised
Reply 1:
Red Hat/Centos v 5 take spare ram and use it for a buffer cache.
100% memory allocation is pretty meaningless because allocation is almost always near 100%. The 2.6.x kernel permits rapid re-allocation of buffer to other purposes eliminating a performance penalty that you see on an OS like HP-UX
I'm not thrilled with your formula because it includes swap(virtual memory). If you start digging too deep into virtual memory, your system start paging processes from memory to disk and back again and slows down badly.
The formula is however essentially correct.
Reply 2:
Here, a quick example from the machine under my desk:
Mem: 3849216k total, 3648280k used, 200936k free, 210960k buffers
Swap: 4194296k total, 64k used, 4194232k free, 2986460k cached
If the value of 'Swap used' is up (i.e. hundreds of megabytes), then you've got an issue, but as you can see, it's only 64k here.
Your formula for how much memory is used is something along the lines of this:
(Used - (Buffers + Cached) / Total) * 100 = Used-by-programs%
(Free + Buffers + Cached / Total) * 100 = Free%
.. Roughly ..
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2銆佸鏋滀笉琛岋紝鍐峴udo apt-get install vim
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sudo apt-get install ia32-libs榪欏彞濂藉儚娌″獎(jiǎng)鍝嶏紝鍥犱負(fù)嫻嬭瘯鏈烘槸amd錛?4
瀹夎濂藉悗錛岀櫥褰昰uest OS鍚庯紝鍐嶈vmware-tools錛屼笉瑕佸崟鐙笅杞斤紝涔嬮棿vm-install vmware-tools灝卞彲浠?br />
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anonymous_enable=YES
local_enable=YES
write_enable=YES
local_umask=022
anon_upload_enable=YES
anon_mkdir_write_enable=YES
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
chown_uploads=YES
chown_username=honzeland
ftpd_banner=Welcome to blah FTP service.
secure_chroot_dir=/var/run/vsftpd
pam_service_name=vsftpd
rsa_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
anon_root=/home/ftp
2. Now we must make writable directory for anonymous user.
cd /home/ftp
sudo mkdir opendir
sudo chmod 777 opendir/
Note: 閲囩敤proftp浣渟erver錛屽畨瑁呴厤緗洿瀹規(guī)槗
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1. Get the source bundle from the Pidgin download site
http://pidgin.im/pidgin/download/source/
2. Extract the contents
tar jxf pidgin-2.0.0.tar.bz23. Install some prerequisites
cd pidgin-2.0.0
sudo apt-get install \(Thanks to the Ubuntu forums for tips on the SSL library packages)
libglib1.2-dev \
libglib2.0-dev \
libgtk2.0-dev
sudo apt-get install \
libnspr-dev \
libnspr4 \
libnspr4-0d \
libnss3 \
libnss3-0d \
libnss-db \
libnss-dev \
libssl0.9.8 \
libssl-dev \
openssl \
ssl-cert
4. Configure the build
Override defaults pointing to older versions of GLib and GTK, then generate the makefiles and other build configuration.
export GLIB_LFLAGS=-lglib-2.0Add a "--prefix=DIR" option to the configure command if you prefer to specify a custom installation directory.
export GLIB_CFLAGS="-I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include"
export GTK_LFLAGS="-lgtk-x11-2.0 -lcairo -latk-1.0"
export GTK_CFLAGS="-I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include \
-I/usr/include/cairo -I/usr/include/atk-1.0"
export pango_LIBS=-lpango-1.0
export pango_CFLAGS=-I/usr/include/pango-1.0
export CFLAGS="$GLIB_CFLAGS $GTK_CFLAGS $pango_CFLAGS"
./configure
****************************************************************************
./configure 鍑虹幇閿欒
checking for LIBXML... no
no
configure: error:
You must have libxml2 >= 2.6.0 development headers installed to build.
浜庢槸瀹夎
sudo apt-get install libxml2-dev
*****************************************************************************
5. Build the software
makeIf that doesn't work, redirect the output of "make" to a file and search for the string "errors:" to see what went wrong:
make > OUTPUT 2>&16. Install the software
sudo make installIf you ran the configure script with a custom prefix option pointing to a directory that you can write to without root privileges, then you can run "make install" without the "sudo".
7. Done
So that's it. If you are upgrading from Gaim 1.5, all of your configuration will be copied from the .gaim directory to .purple in your home directory. Your log files will also be moved, but a symbolic link will point from the .gaim/logs directory to the .purple/logs directory.
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2. 浠ヤ笅杞歡瀹夎鍙互鍏堥氳繃ubuntu鑷甫鐨勫伐鍏鳳細(xì)搴旂敤紼嬪簭 -> 娣誨姞/鍒犻櫎...鏉ユ悳绱㈠叧閿瓧鏉ユ煡鐪嬫槸鍚﹀瓨鍦?br />
3. qq杞歡錛歟va聽聽 聽聽 msn:浣跨敤gaim涓嚜甯︾殑灝卞彲浠ヤ簡(jiǎn)
4. 闊充箰錛歛udacious or beep-media-player
5. 瑙嗛錛氬弬瑙?http://wiki.ubuntu.org.cn/EdgyGuide#head-a12a543ea800098877d88c7a8e2813dfb5253a55
聽聽 1) totem-xine: sudo apt-get install totem-xine w32codecs libxine-extracodecs
聽聽聽聽聽聽聽娉ㄦ剰錛歵otem-xine鍦ㄦ墦寮url鏃訛紝闇瑕佸湪 鎵撳紑浣嶇疆 鍚庯紝鍙沖嚮榧犳爣灝嗛夋嫨鐨?X杈撳叆娉?鏀規(guī)垚 榛樿錛屽惁鍒欙紝鐐瑰嚮鎵撳紑浣嶇疆鍚幝狅紝totem-xine灝嗕細(xì)鍋滄鐩稿簲銆?br />聽聽 2) vlc
聽聽 3) Mplayer
聽聽 4) realplayer
6. ftp client: KFTPgrabber or filezilla
聽聽 瀵逛簬KFTPGrabber鍙互閲囩敤apt-get鐩存帴瀹夎,瀹夎鍚庡湪 Setting -> Configure KFTPGrabber... -> 甯歌 -> Bookmarks 涓殑緙栫爜閫夋嫨gb2312,鐒跺悗鍦˙ookmarks -> 緙栬緫涔︾ 涓瘡涓绔欑偣Advanced涓殑鏈嶅姟鍣ㄧ紪鐮佷腑閫夋嫨gb2312
聽聽 瀵逛簬filezilla錛?br />鍦?Windows 涓婃湁鍊嬪ソ鐢ㄧ殑 FTP client -- Filezilla錛屽畠?yōu)鍙互瑷畾閬犵?FTP Server 鐨勭法紕鹼紝鑰岀従鍦?Filezilla 涔熸湁 Linux 鐗堟湰浜?jiǎn)锛屽彲浠ュ埌瀹冨畼鏂咕E茬珯涓嬭級(jí)錛坔ttp://filezilla-project.org/nightly.php錛夛紝瑙ｉ枊寰岋紙鐢?tar -jxvf錛夋渻鏈変竴鍊?filezilla3 鐨勭洰閷勶紝瑁￠潰鍒嗗垾鏈?bin, share 鐨勭洰閷勶紝浣犲彲浠ユ寜鐓т笅闈㈡椹熶締瀹夎錛?br />
聽聽 1) 鎶?filezilla3/bin/ 鐩寗涓嬬殑妾旀鏀懼湪 /usr/local/bin 涓嬶紙sudo mv filezilla3/bin/* /usr/local/bin/錛夈?br />聽聽 2) 鎶?filezilla3/share/ 鐩寗涓嬬殑妾旀鏀懼湪 /usr/local/share/filezilla 鐩寗涓嬶紙sudo mv filezilla3/share/filezilla /usr/local/share/錛夈?br />聽聽 3) 鐒跺緦鍦?/usr/share/applications 涓嬫柊澧炰竴鍊?filezilla.desktop 鐨勬獢妗堬紝鍏у濡備笅錛?br />
聽聽聽聽聽聽聽聽聽 [Desktop Entry]
聽聽聽聽聽聽聽聽聽 Encoding=UTF-8
聽聽聽聽聽聽聽聽聽 Name=Filezilla 3
聽聽聽聽聽聽聽聽聽 Comment=Filezilla FTP Client
聽聽聽聽聽聽聽聽聽 Exec=filezilla
聽聽聽聽聽聽聽聽聽 Icon=/usr/local/share/filezilla/resources/filezilla.png
聽聽聽聽聽聽聽聽聽 Terminal=false
聽聽聽聽聽聽聽聽聽 Type=Application
聽聽聽聽聽聽聽聽聽 Categories=Application;Network;
聽 閫欐ǎ灝卞彲浠ュ湪閬稿柈涓嬪暉鍕?Filezilla 浜?jiǎn)銆?br />聽 鑰岃ō瀹氶仩绔己鏈嶅櫒綬ㄧ⒓鐨勫湴鏂癸紝蹇呴爤瑕佸湪绔欒嚭綆＄悊鍝¤！璦畾鎵嶈錛屽湪绔欑偣綆＄悊 -> 瀛楃闆?-> 浣跨敤鑷畾涔夊瓧絎﹂泦 涓夋嫨gb2312
7. Qterm: 鐩存帴apt-get
8. chm 鍜?pdf嫻忚鍣ㄩ噰鐢ㄦ坊鍔?鍒犻櫎宸ュ叿鏉ュ疄鐜?br />
9. ubuntu榛樿娌℃湁瑁卻sh鏈嶅姟錛岀洿鎺pt-get ssh灝卞彲浠ヤ簡(jiǎn)
10. 鏇村鍙傝?a >http://hi.baidu.com/wmywind/blog/item/16cb6c6089a251de8cb10d62.html
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