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09-28 17:16:37. 543: Debug/dalvikvm (21466): gc_external_alloc freed 390 objects/45656 bytes in 50 ms09-28 17:16:40. 513: Debug/dalvikvm (3267): gc_explicit freed 4501 objects/251624 bytes in 67 Ms Many developers do not understand what the above sentence means. I 'd like to explain it to you! The preceding free memory is the memory used by Java in the VM. External refers to the memory allocated by malloc

Memory debugging things D/dalvikvm (809): GC_CONCURRENT freed, dalvikvmGenerally, Java virtual machines must support the verbosegc option to output detailed garbage collection debugging information. The dalvik Virtual Machine quietly accepts the verbosegc option and does nothing. The dalvik virtual machine uses its own LOG mechanism to output debugging information. If you run the adb logcat command in Linux, you can see the following output: D/dalvikv

General Java virtual machines require support for the VERBOSEGC option to output detailed garbage collection debugging information. Dalvik virtual machines are quiet to accept the VERBOSEGC option, and then do nothing. The Dalvik virtual machine uses its own set of log mechanisms to output debug information. If you run the ADB logcat command under Linux, you can see the following output: NBSP;D/DALVIKVM (745): Gc_concurrentfreed 199K, 53% free 3023k/ 6343k,external 0k/0k, paused 2ms+2ms where D

Summary: This blog post explains why you should not call Dispose () after a task in. NET 4.X has finished using it. and description. NET4.5 part of the improvements to the. NET4.0 Task object: Mitigating the task's dependency on the WaitHandle object, and enhancing the accessibility of the task to its members after releasing it.I have received this question many times:"The task implements the IDisposable interface and exposes the Dispose () method, does that mean we are going to release all the

Java_ Multi-threaded _ Lock Release Q: In the context of a Java multithreaded runtime, in which cases will the object lock be freed?A: Since the thread waiting for a lock can only be resumed after the lock is acquired, it is important that the thread holding the lock release the lock in time when the lock is no longer needed. The thread holding the lock releases the lock in the following cases:(1) When the synchronization code block is executed, the l

Free heap block xxxxxx modified at xxxxxx after it was freed I believe many of my friends have encountered the above problems, but they often suffer from the inability to locate the wrong code. In fact, this problem is generally caused by the use of a wild pointer. So what is a wild pointer? The wild pointer is different from the NULL pointer. The so-called wild pointer indicates that the memory indicated by the pointer has been recycled, and this

ORA-00257: archiver error. Connect internal only. until freed, ora-00257freed1. plsq logon Error ORA-00257: archiver error. Connect internalonly. until freed 2. the alert Log in the background reports the following error: [Oracle @ powerlong4 ~] $ Tail-fn 200/oracle/app/oracle/diag/rdbms/pdunq/powerdes/trace/alert_powerdes.log Tue Apr 28 10:00:56 2015 Errors in file/oracle/app/oracle/diag/rdbms/pdunq/powerd

Ora-00257:archiver error. Connect internal only, until freed error handling methodBackground: Recently always in the Oracle database, a few days ago to a company's Oracle database to do a real-time synchronization function, synchronization must open the Archive log function, due to the large volume of production data, less than 1 days to the Oracle log space is full. The following error is reported: Ora-00257:archiver error. Connect internal only, unt

Archivelog all; --Delete expired logs, this library does not have an expiredFreed Channel: Ora_disk_1Allocated channel: Ora_disk_1Channel ora_disk_1:sid=68 Device Type =diskDescription does not match any archive log in the repository--there is no expiration, in order to make room for space, it is specified to the specific time to delete it.Rman>delete Archivelog until Time "to_date (' 2013-09-04 13:00:00 ', ' yyyy-mm-dd hh24:mi:ss ')";--After the deletion in the use of the log to see the space

started.Total System Global area 3373858816 bytesFixed Size 2218032 bytesVariable Size 1694500816 bytesDatabase buffers 1660944384 bytesRedo buffers 16195584 bytesDatabase mounted.Database opened.Sql>9, then log in using Plsql, and now you can log in normally.Summary, because Oracle's Dataguard interrupted, so the primary on the archive log has been accumulated, resulting in a full archive of the space, so the database can not log in remotely, this time to use the common method may have the fol

patterns, include, urlUrlpatterns = Patterns ("',URL (r ' ^$ ', ' west.views.first_page '),) The URL corresponds to the First_page function in west, views.py. Finally, under West, modify the views.py to: #-*-Coding:utf-8-*- From django.http import HttpResponse def first_page (Request): Return HttpResponse (" Visit Http://127.0.0.1:8000/west to see the effect.6. SummaryAs you can see, the Django creation process is very simple. But this is just the first

Generally, Java virtual machines must support the verbosegc option to output detailed garbage collection debugging information. The Dalvik Virtual Machine quietly accepts the verbosegc option and does nothing. The Dalvik virtual machine uses its own log mechanism to output debugging information. If you run the ADB logcat command in Linux, you can see the following output:D/dalvikvm (745): gc_concurrentFreed 199 K, 53% free 3023 K/6343 K, external 0 k/0 k, paused 2 MS + 2 ms Among them, D/dal

? BSTR BSTR bstrxml = NULL;After you run out of time, or in a catch segmentif (bstrXML):: SysFreeString (Result); VARIANT VARIANT Varfilename;After you run out of time, or in a catch segmentVariantClear (varfilename); A COM interface that supports release, such as: IXMLDOMDocument *pxmldom=null;IXMLDOMDocument *pxsldoc=null;After you run out

ReasonThe navigation properties of the entity are used in view, but the context of the entity is already disposed of by using the controller, but the entity has deferred Query evaluation nature, so The navigation Property object was not loaded, resulting in the above error.Solution Solution One:How to:explicitly Load related ObjectsDisable the deferred query Evaluation for the context and then manually load all the required navigation properties after the query finishesFalseif (! Contact. sales

1, User connection errorSql> conn Scott/[email protected];ERROR:Ora-00257:archiver error. Connect internal only, until freed. --Archive error (log space full)Rman joins the same error in the form of catalog.2, check the use of Flash_recovery_area_usageSql> Conn/as sysdba;Connected.Sql> Show parameter log_archive_dest;NAME TYPE VALUE------------------------------------ ----------- ------------------------------Log_archive_dest stringLog_archive_dest_1

After the process finishes, all memory for the process is freed, including memory leaks on the heap. The reason is that when the process is finished, the GDT, LDT, and page directories are changed by the operating system, the logical memory is all gone, the contents of the physical memory may still be in but the logical memory has been removed from the LDT and GDT, the page directory table is all destroyed, so the memory will be fully recovered.This c

Error Environment: winxp+oracle9.2.0.1 Client win2003+oracle9.2.0.5 Service Side First, the error process: Execute the following statement on the client: Conn SCOTT/TIGER@PGJT Declare I number; Begin Select S.nextval into I-dual; While iLoop Insert into B values (i); End Loop; End An error occurred, the client is a fake panic phenomenon. Open a new window: Sql> Conn SCOTT/TIGER@PGJT is connected. Sql> select Sid,serial#,username from V$session; SID serial# USERNAME --------- --------- ---------

Post: original address http://blog.csdn.net/panys/article/details/3838846 Archive log is fullORA-00257: How to Handle archiver error. Connect internal only, until freed error 1. Log On with the sys userSqlplus sys/pass @ tt as sysdba 2. Check the location of the archiv log.SQL> show parameter log_archive_dest;NAME TYPE VALUE-----------------------------------------------------------------------------Log_archive_dest stringLog_archive_dest_1 stringLo

compromised. This mechanism is triggered at (Getnumidle () Example: When maxactive=20, active connection is 18, idle connection is 1 can trigger "removeabandoned". However, active connections are deleted only if they are not used for more than "Removeabandonedtimeout". The default is 300 seconds. Travels in ResultSet are not counted as being used.Logabandoned=true, after the event, will be in the log to print out the recovery of connection error message, including where to use the connection bu

device, the efficiency is very low, so the buffer for efficiency, when writing to the device, the buffer will be written, until the buffer has enough data ( Anti-theft Connection: In this article starting from http://www.cnblogs.com/jilodream/), the overall write device (note that when drawing GUI interface, it is also used to ensure that the interface is not flashing when drawing or dragging). Flush () means that the data in the buffer is forced to be sent out without waiting until the buffer