queue metrics

InnoDB table to monitor the remaining space of the InnoDB table.21.QPS Query volume per secondQPS = Questions (or Queries)/secondsMySQL > Show/* global * * status like ' Question ';22.TPS (transaction volume per second)TPS = (com_commit + com_rollback)/secondsMySQL > Show status like ' Com_commit ';MySQL > Show status like ' Com_rollback ';23.key Buffer hit RatioKey_buffer_read_hits = (1-key_reads/key_read_requests) * 100%Key_buffer_write_hits = (1-key_writes/key_write_requests) * 100%Mysql> Sh

/s rkb/s wkb/s avgrq-sz avgqu-sz await r_await w_await SVCTM%utilVDA 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00iostat-x VDA 1 2 command meaning: Every 1 seconds print the VDA this disk usage information, print two times altogether. %util indicates CPU busy, higher and busierUniversal Command-SAR(System Activity Report) is one of the most comprehensive systems performance analysis tools available on Linux and can be used to report system activity in many ways.Performance mon

, because SQL Server needs to always maintain 5-10m free memory for allocation, and when this value is below 5m, SQL Server may have a performance bottleneck due to a lack of memory. 4.Physical Disk:% Disk Time This counter records how busy the disk is (whether the entire disk array or physical disk is busy). Theoretically this value should be less than 55%, and if it continues above 55%, that means there may be an IO bottleneck on this server. If only occasionally appear several times, that

Swap/set"CAS has three operations: current in-memory value V, expected value A, updated value B, only when A==v is updated to B, otherwise nothingTaking Atomiclong as an examplePublic final long Incrementandget () {for (;;) { Long current = Get (); Long Next = current + 1; if (Compareandset (current, next)) return next; } }The Compareandset method calls the native method to implement the CAS operation, where current is a value obt

/down) # method two: Solve X=np.vstack according to the SCIPY library ([x, Y]) d2=pdist (x, ' jaccard " ) Brecotis distance (Bray Curtis Distance)Bray Curtis Distance is mainly used in ecology and environmental science to calculate the distance between coordinates. The distance value is between [0,1]. It can also be used to calculate the differences between samples.Sample data:Calculation:Implementations in Python:Import NumPy as NPimport pdistx=np.array ([11,0,7,8, 0]) Y=np.array ([24,37,5,18,

 The following is a brief list of common recommended system metrics: 1. Accuracy rate and Recall rate (Precision Recall) Accuracy and recall rates are two measures widely used in the field of information retrieval and statistical classification to evaluate the quality of the results. The accuracy is to retrieve the number of related documents and the total number of documents retrieved, to measure the precision of the retrieval system; Recall is t

Usability Checklist, Website usability Detection Tool (http://web.mit.edu/is/usability/usability-guidelines.html)Web content Accessibility Guidelines, accessibility guidance from W3 Web site (http://www.w3.org/TR/WAI-WEBCONTENT/SEO checklist, this humble web page provides amazing value for Google seo (http://www.vaughns-1-pagers.com/internet/google-ranking-factors.htm)SEOMOZ, if you want to find a global SEO's only authority, that's them. (http://www.seomoz.org)22. Point stone Interaction, if y

My team has popularized the use of Codeanalyzer to analyze Code metrics (metric), sharing experience here. The first explanation is that Codeanalyzer is a jar file that you can run, and it can be used to get statistics on our code, and here is a detailed explanation of how to use the tool in conjunction with our development environment. (1) Copy the Code-analyzer- (2) The configuration X-window is as follows, in particular, the input in the command

Designing concurrent Queues Copy Code code as follows: #include #include using namespace Std; Template Class Queue{PublicQueue (){Pthread_mutex_init (_lock, NULL);}~queue (){Pthread_mutex_destroy (_lock);}void push (const t data);T pop ();PrivateListpthread_mutex_t _lock;}; Template void Queue{Pthread_mutex_lock (_lock);_list.push_back (value);

Server Pages Request errors/sec The number of errors per second, including connection errors, compilation errors, and Run-time errors. If the number is always greater than 0, there is a problem with the test script, server configuration, or ASP script. Active Server Pages Requests Queued The counter should remain close to 0. The "server is too busy" error occurs when the IIS queue length is exceeded. Active Ser

ASP Request bytes out total to the client ). Standard HTTP Response Headers are not included. The time (in milliseconds) that ASP request execution time takes to execute the most recent request ). The waiting time (in milliseconds) of the most recent ASP Request wait time request in the queue ). ASP requests disconnected number of requests that disconnect due to communication failure. The number of requests currently executed by ASP requests executin

. Concurrent users: The number of TCP connections created. If a browser has a connection that has been created to send 10 requests to the server, then the number of concurrent users is counted. Note: browsers now support multiple threads and can establish multiple TCP connections with the server, so one user can cause multiple concurrent users. So "concurrent users" and "users" cannot be fully equated, which requires attention.average request wait time and server average request processing time

Atitit. Java Queue Queue System and its own definition of the database-based queue summary o7t1. Block queue and non-clogging queue 12. Java.util.Queue interface. 13. Concurrentlinkedqueue 24. Blockingqueue Jam Queue 24.1.1. Arra

The array implementation of the queue, from the end of the team into, the enemy deleted.Queue Length with the flag variable size, which is a variable independent of front and rear. Size = = 0, the queue is empty. Size = = capacity, full queue.I. Statement of statements 1 struct node{ 2 int capacity; 3 int Front; 4 int Rear; 5 int Size; 6 int * Array; 7 }; 8 typedef struct Node

Bit crossing, because the queue operation is relatively simple, I say nothing, directly on the code, welcome to verify!!!#pragma Mark--abstractThe //queue is a linear table that allows insertions at one end of the table, and deletes at the other end of the table, allowing the inserted end to be called the tail of the team (rear)//Allow deletion of one end called the team header (font), the

/** * PHP Class for queue * @author yangqijun@live.cn * @copyright Datafrog Beijingbei Ltd. 2011 -07-25 * * classQueue { Public$length= A;//default queue, equivalent to initialize queue Public$queue=Array();//If String like this ' 22,23,24 ' convert to array to do queue Publ

The PHP Data structure queue (SplQueue) and the priority queue (SplPriorityQueue) are simple to use instances, and the priority queue data structure. PHP Data structure queue (SplQueue) and priority queue (SplPriorityQueue) are simple to use instances. The data structure of

Queue /QueueArray queueArray queue is an array-based implementation of the queue, its implementation is similar to the array stack, is a FIFO linear data structure.Queue: The following will use the list in Python instead of the array in the C language to implement the data structure of the array queue.Note: The implementation here does not apply a fixed-si

/** * File name: Queuetext.java * Time: October 22, 2014 9:05:13 * Xiu Kang */package chapter3;/** * Class Name: Arrayqueue * Description: Array implementation of queue */class array queueJava implementation array queue, loop array queue, chained queue

PHP data Structure Queue (Splqueue) and Priority queue (Splpriorityqueue) Simple usage instance, priority queue data structure Queue this data structure is simpler, just like in our lives, it is characterized by FIFO. The Splqueue class in PHP SPL is the implementation of queue