Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Support
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
M
mariadb
Project overview
Project overview
Details
Activity
Releases
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Issues
0
Issues
0
List
Boards
Labels
Milestones
Merge Requests
0
Merge Requests
0
Analytics
Analytics
Repository
Value Stream
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Create a new issue
Commits
Issue Boards
Open sidebar
Kirill Smelkov
mariadb
Commits
9c607001
Commit
9c607001
authored
Jun 24, 2003
by
monty@mashka.mysql.fi
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
indentation change
parent
d58b4bed
Changes
1
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
14 additions
and
13 deletions
+14
-13
Docs/internals.texi
Docs/internals.texi
+14
-13
No files found.
Docs/internals.texi
View file @
9c607001
...
...
@@ -200,20 +200,21 @@ to disk (but of course not as optimally as simple calling a sync on
all tables)!
@item
When one does a @code
{
FLUSH TABLES
}
, the variable @code
{
refresh
_
version
}
When one does a @code
{
FLUSH TABLES
}
, the variable @code
{
refresh
_
version
}
will be incremented. Every time a thread releases a table it checks if
the refresh version of the table (updated at open) is the same as
the current @code
{
refresh
_
version
}
. If not it will close it and broadcast
a signal on @code
{
COND
_
refresh
}
(to wait any thread that is waiting for
all instanses of a table to be closed).
@item
The current @code
{
refresh
_
version
}
is also compared to the open
@code
{
refresh
_
version
}
after a thread gets a lock on a table. If the
refresh version is different the thread will free all locks, reopen the
table and try to get the locks again; This is just to quickly get all
tables to use the newest version. This is handled by
@file
{
sql/lock.cc::mysql
_
lock
_
tables()
}
and
the refresh version of the table (TABLE->version), which is updated at
open, is the same as the current @code
{
refresh
_
version
}
. If not it will
close it and broadcast a signal on @code
{
COND
_
refresh
}
(to wake up any
thread that is waiting for all instanses of a table to be closed).
@item
The current @code
{
refresh
_
version
}
is also compared to the open
@code
{
refresh
_
version
}
after a thread gets a lock on a table. If the
refresh version is different the thread will free all locks, wait for
all 'old' tables to be closed (in wait
_
for
_
refresh() ) reopen the table
and try to get the locks again; This is just to quickly get all tables
to use the newest version. This is handled by
@file
{
sql/lock.cc::mysql
_
lock
_
tables()
}
and
@file
{
sql/sql
_
base.cc::wait
_
for
_
tables()
}
.
@item
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment