Error: Process Performance Counter is disabled, so the requested operation cannot be specified med
This is caused by some disabled items set by the system. The solution is as follows:
1. Click the "Start" menu, select "run", and enter the command line: Regedit to open the system registry;2. Locate HKEY_LOCAL_MACHINE/system/CurrentControlSet/services/perfproc/
, the concurrent markup read operation can also correctly affect our counter.
Performance?
We have previously described how to implement an unread message counter that can be updated correctly, and we may be using the UPDATE statement directly to modify our counters, like this:
Copy Code code as follows:
From Django.db.models import F
def u
Counter (Counter) is a very common functional component, this blog in the number of unread messages, for example, describes the implementation of a high-performance counters in Django basic points.
The beginning of the story:. Count ()
Suppose you have a notification model class that saves mostly all of the site notifications:
The code is as follows:
Class Notif
. For example, when you use multiple backup devices in parallel or use a faster device, you can measure the performance changes in database backup operations. Throughput of a database backup or restore operation can determine the process and performance of backup and restore operations
SQL Server General Statistics
Us
anomaly has been normal in the near future.?
SQL Server Performance Alarm Monitoring
Performance currently monitors CPU, disk space, user concurrency counter value of three, as shown, see the document:
Monitoring objects
Counter Name
Monitoring frequency
Co
by default. To obtain performance counter data for a logical drive or storage volume, you must type DISKPERF–YV at the command prompt. By default, the operating system uses the DISKPERF–YD command to include physical drive data. For more information about using command diskperf, at a command prompt, type diskperf-?.4. In general, determining whether performance
m## about http2.0Please read: [HTTP 2.0] [http://mrpeak.cn/blog/http2/] background
Our seven-layer load layer, using 5 24u+64g memory of the physical machine branch nginx do HTTPS plus decryption and proxy_pass. The daily commute time, 5 machine CPU basically in about 50%, be counted type.Optimization means: keepalive, change TLS1.2 encryption algorithm optimization (reference:), etc., the effect is not small.Especially concise keepalive options, regardless of how the server support, the key is
Summary in the previous section:
Previous sectionAnalysis of QBlog technical principles in the autumn color Garden: Performance Optimization: Concurrent limit of access and Distributed Concurrency solution of sub-databases (16) Medium,
This article introduces the maximum concurrency of Access and, to some extentQBlogThe maximum concurrency is increased from 64 to 64 * N (databases). Although the maximum concurrency is increased, however, the maximum
LoadRunner Performance Test Results Counter indicator descriptionreprinted 2015-09-23 09:57:13 Tags: loadrunner counterFor the performance test results analysis process, the face of a large number of test data, but feel not to analyze. Today we have a simple description of the individual monitored objects in the Window
Our app is using custom performance counters working with MS perfmon.exe for performance monitoring/logging. So I take a quick look at msdn about this domain classes for overview.
System. Diagnostics namespace
TheSystem. DiagnosticsNamespace provides classes that allow you to interact with system processes, event logs, and performance counters.
the Event
restore throughput, and transaction log activity
SQL Server Databases counters
Description
Active Transactions
The number of active transactions for the database.
Backup/restore throughput/sec
Read/write throughput for the backup and restore operations of the database per second. For example, when you use multiple backup devices in parallel or use a faster device, you can measure the performance
pay attention to the trend changes of this counter. If you suspect Memory leakage, Please monitor memory \\
Available bytes and memory \ committed bytes to observe memory behavior and monitor what you think may be leaked
Process \ private bytes, Process \ working set, and process \ handle count of the stored
There are data, there is truth, I believe that everyone in peacetime work or learning process, you need to compare several different methods or the performance gap between the implementation. At these times, it is often necessary for us to constantly create stopwatch, open, close, and then print time. This repetition will one day be unbearable, so if you can have a "standard"
The approximate process of the system is as follows: Receive the packet from the data center (10,000 ~3 million)/sec, using WCF can be used by different scenarios, each of which has the same business logic, and each scenario receives the same code for the packet part, and then uses a container to all the "scenario DLL "Loading by reflection, while the container receives all packets and sends them to the" Application scenario DLL ", the ability to rece
When installing SQL Server 2003 Development edition and Enterprise Edition on Windows Server 2000, Windows XP, or Windows 2008, the "performance counter registry Configuration unit consistency" check will fail (Windows Server 2008 has not been tested due to no environment currently)
(Figure 1)
The installation error message is:
(Figure 2)
Solution:
First, openHttp://support.microsoft
process used to batch flush dirty aging buffers that contain changed buffers, which must be rewritten back to disk to reuse buffers for other pages, and make them available to user processes. Lazy writers do not need to perform frequent checkpoints to create free buffers.
Page Life expectancy
The number of seconds that the page will stay in the buffer pool if it is not referenced.
Page lookups/sec
The number of r
tables).
Well, would it be better to have two tables stored? One table to save the details of the article, the other table separately stored counter.
The code is as follows:
CREATE TABLE ' Article_view ' (
' article_id ' int (one) is not NULL,
' View ' int (one) is not NULL,
PRIMARY KEY (' article_id ')
) Engine=innodb;
This way, although sharing the pressure of the article table, but whenever there is
tables? A table to save the details of the article, the other table separately stored counter.
Copy Code code as follows:
CREATE TABLE ' Article_view ' (
' article_id ' int (one) is not NULL,
' View ' int (one) is not NULL,
PRIMARY KEY (' article_id ')
) Engine=innodb;
This way, although sharing the pressure of the article table, but whenever there is a process request upd
As a result of monitoring and reporting needs, statistical performance counter daily values, to confirm the health of the database server. If open counter to fill in, more trouble, now statistics with PowerShell to read the value of the counter.
Phase I: Powershell read the counte
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