rca root cause analysis

waiting events, you can eliminate database issues. If there is a waiting time, you can find the root cause of these events based on different waiting events.For example, latch free and other wait events related to SQL parse, OS performance is high CPU usageDB file scattered read and other wait times related to SQL disk read. The OS performance is that iostat can see an increase in disk read/write volumes.S

, and even to view the information in the System_health event session, I use File_target,ui to read and handle events without manually performing any XQuery. Observe the use of memory It is unheard of for me to be very careful about how to configure Ring_buffer targets on a production server.Two weeks ago, Andy Galbraith encountered an error with all the connections reported to the 701 system with low memory,After analysis, Andy found that in memory 1

Cause Analysis of user disconnection Problems Wu Yu Taiyan Network Studio Rarely participate in weekly third-party meetings. Yesterday, I had to explain a complaint and listened to the complaint for half time. Among them, the most controversial is also the most serious problem of recent complaints, that is, the user disconnection problem. There are many C/S architecture products on the market, and there ar

"); } }); }}Androidmanifast.xml, you can also add permissions to this receiver.receiverAndroid:name= "Com.example.broadcasttest.MyBroadcastReceiver"android:permission= "Com.example.broadcasttest.RECV_MYBC" > Intent-filter> ActionAndroid:name= "Com.example.broadcasttest.MY_BROADCAST" /> Intent-filter> receiver>The phenomenon is that the broadcast accepts failure."Problem root

string is invalid", to view the database registration information, and then use the connection string attempt to manually log in, unexpectedly prompted the login failed. Then view the status of the account as "EXPIRED".The account has expired, this is not the reason why ARCSOC is growing? It is very likely that, when a connection request fails, it is possible to continually attempt to repeatedly request a connection, and ArcGIS server assigns it a ARCSOC process for each connection request. If

Android Root access cracking analysis Many friends of the new Android machine has not cracked the root permissions, can not use some high privileges of the software, as well as a number of highly privileged operations, in fact, crack the root of the mobile phone is relatively simple and safe, the principle of cracking

install windows 95 and then install Linux, the/boot/boot0000300 is your original windows 95 MBR.1. Start to boot with a floppy disk or CD:Boot: vmlinuz root =/dev/hdXY (for example, hda1)Run after startup #/sbin/lilo2. After starting with two floppy disks:# Mount-t ext2/dev/hda1/mnt# Ln-s/mnt/boot# Ln-s/mnt/etc/lilo. conf/etc/lilo. conf#/Mnt/sbin/lilo1./sbin/lilo-B/dev/fd02. boot the disk to boot with Redhat:Boot: vmlinuz

. The fourth rule is actually embodies the happens-before principle has the transitive nature. 5, in-depth analysis of volatile keyword 5.1 volatile keyword two-layer semanticsOnce a shared variable (a member variable of a class, a static member variable of a class) is modified by volatile, then there are two layers of semantics: The visibility of this variable is ensured by a thread that modifies the value of a variable, which is im

Objective When you recently deployed the Log Analysis tool Awstats on Nginx, when configuring Awstats analysis results for web browsing, Analysis results page access is always 404. Later looked at some data, found that the use of root and alias difference did not understand the ca