403Webshell
Server IP : 103.119.228.120  /  Your IP : 3.136.23.132
Web Server : Apache
System : Linux v8.techscape8.com 3.10.0-1160.119.1.el7.tuxcare.els2.x86_64 #1 SMP Mon Jul 15 12:09:18 UTC 2024 x86_64
User : nobody ( 99)
PHP Version : 5.6.40
Disable Function : shell_exec,symlink,system,exec,proc_get_status,proc_nice,proc_terminate,define_syslog_variables,syslog,openlog,closelog,escapeshellcmd,passthru,ocinum cols,ini_alter,leak,listen,chgrp,apache_note,apache_setenv,debugger_on,debugger_off,ftp_exec,dl,dll,myshellexec,proc_open,socket_bind,proc_close,escapeshellarg,parse_ini_filepopen,fpassthru,exec,passthru,escapeshellarg,escapeshellcmd,proc_close,proc_open,ini_alter,popen,show_source,proc_nice,proc_terminate,proc_get_status,proc_close,pfsockopen,leak,apache_child_terminate,posix_kill,posix_mkfifo,posix_setpgid,posix_setsid,posix_setuid,dl,symlink,shell_exec,system,dl,passthru,escapeshellarg,escapeshellcmd,myshellexec,c99_buff_prepare,c99_sess_put,fpassthru,getdisfunc,fx29exec,fx29exec2,is_windows,disp_freespace,fx29sh_getupdate,fx29_buff_prepare,fx29_sess_put,fx29shexit,fx29fsearch,fx29ftpbrutecheck,fx29sh_tools,fx29sh_about,milw0rm,imagez,sh_name,myshellexec,checkproxyhost,dosyayicek,c99_buff_prepare,c99_sess_put,c99getsource,c99sh_getupdate,c99fsearch,c99shexit,view_perms,posix_getpwuid,posix_getgrgid,posix_kill,parse_perms,parsesort,view_perms_color,set_encoder_input,ls_setcheckboxall,ls_reverse_all,rsg_read,rsg_glob,selfURL,dispsecinfo,unix2DosTime,addFile,system,get_users,view_size,DirFiles,DirFilesWide,DirPrintHTMLHeaders,GetFilesTotal,GetTitles,GetTimeTotal,GetMatchesCount,GetFileMatchesCount,GetResultFiles,fs_copy_dir,fs_copy_obj,fs_move_dir,fs_move_obj,fs_rmdir,SearchText,getmicrotime
MySQL : ON |  cURL : ON |  WGET : ON |  Perl : ON |  Python : ON |  Sudo : ON |  Pkexec : ON
Directory :  /usr/share/doc/postgresql-9.2.24/html/

Upload File :
current_dir [ Writeable] document_root [ Writeable]

 

Command :

[ Back ]     

Current File : /usr/share/doc/postgresql-9.2.24/html/mvcc.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Concurrency Control</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REV="MADE"
HREF="mailto:pgsql-docs@postgresql.org"><LINK
REL="HOME"
TITLE="PostgreSQL 9.2.24 Documentation"
HREF="index.html"><LINK
REL="UP"
TITLE="The SQL Language"
HREF="sql.html"><LINK
REL="PREVIOUS"
TITLE="Migration from Pre-8.3 Text Search"
HREF="textsearch-migration.html"><LINK
REL="NEXT"
TITLE="Introduction"
HREF="mvcc-intro.html"><LINK
REL="STYLESHEET"
TYPE="text/css"
HREF="stylesheet.css"><META
HTTP-EQUIV="Content-Type"
CONTENT="text/html; charset=ISO-8859-1"><META
NAME="creation"
CONTENT="2017-11-06T22:43:11"></HEAD
><BODY
CLASS="CHAPTER"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="5"
ALIGN="center"
VALIGN="bottom"
><A
HREF="index.html"
>PostgreSQL 9.2.24 Documentation</A
></TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
TITLE="Migration from Pre-8.3 Text Search"
HREF="textsearch-migration.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
HREF="sql.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="60%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="20%"
ALIGN="right"
VALIGN="top"
><A
TITLE="Introduction"
HREF="mvcc-intro.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="CHAPTER"
><H1
><A
NAME="MVCC"
></A
>Chapter 13. Concurrency Control</H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
>13.1. <A
HREF="mvcc-intro.html"
>Introduction</A
></DT
><DT
>13.2. <A
HREF="transaction-iso.html"
>Transaction Isolation</A
></DT
><DD
><DL
><DT
>13.2.1. <A
HREF="transaction-iso.html#XACT-READ-COMMITTED"
>Read Committed Isolation Level</A
></DT
><DT
>13.2.2. <A
HREF="transaction-iso.html#XACT-REPEATABLE-READ"
>Repeatable Read Isolation Level</A
></DT
><DT
>13.2.3. <A
HREF="transaction-iso.html#XACT-SERIALIZABLE"
>Serializable Isolation Level</A
></DT
></DL
></DD
><DT
>13.3. <A
HREF="explicit-locking.html"
>Explicit Locking</A
></DT
><DD
><DL
><DT
>13.3.1. <A
HREF="explicit-locking.html#LOCKING-TABLES"
>Table-level Locks</A
></DT
><DT
>13.3.2. <A
HREF="explicit-locking.html#LOCKING-ROWS"
>Row-level Locks</A
></DT
><DT
>13.3.3. <A
HREF="explicit-locking.html#LOCKING-DEADLOCKS"
>Deadlocks</A
></DT
><DT
>13.3.4. <A
HREF="explicit-locking.html#ADVISORY-LOCKS"
>Advisory Locks</A
></DT
></DL
></DD
><DT
>13.4. <A
HREF="applevel-consistency.html"
>Data Consistency Checks at the Application Level</A
></DT
><DD
><DL
><DT
>13.4.1. <A
HREF="applevel-consistency.html#SERIALIZABLE-CONSISTENCY"
>Enforcing Consistency With Serializable Transactions</A
></DT
><DT
>13.4.2. <A
HREF="applevel-consistency.html#NON-SERIALIZABLE-CONSISTENCY"
>Enforcing Consistency With Explicit Blocking Locks</A
></DT
></DL
></DD
><DT
>13.5. <A
HREF="mvcc-caveats.html"
>Caveats</A
></DT
><DT
>13.6. <A
HREF="locking-indexes.html"
>Locking and Indexes</A
></DT
></DL
></DIV
><P
>   This chapter describes the behavior of the
   <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> database system when two or
   more sessions try to access the same data at the same time.  The
   goals in that situation are to allow efficient access for all
   sessions while maintaining strict data integrity.  Every developer
   of database applications should be familiar with the topics covered
   in this chapter.
  </P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="textsearch-migration.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="mvcc-intro.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>Migration from Pre-8.3 Text Search</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="sql.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Introduction</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>

Youez - 2016 - github.com/yon3zu
LinuXploit