when no index in password field ,it will cost 18047 ms,but
after creating the index on this field, it will just cost 484 ms.
The comparison is very obvious.
the command to create and drop index on the field is like this :
create index idx_pass on consumer(password);
drop index idx_pass on consumer;

Summarize disk usage of each FILE, recursively for directories.

Mandatory arguments to long options are mandatory for short options too.

-a, –all
write counts for all files, not just directories
-B, –block-size=SIZE use SIZE-byte blocks
-b, –bytes
print size in bytes
-c, –total
produce a grand total
-D, –dereference-args
dereference FILEs that are symbolic links
-h, –human-readable
print sizes in human readable format (e.g., 1K 234M 2G)
-H, –si
likewise, but use powers of 1000 not 1024
-k
like –block-size=1K
-l, –count-links
count sizes many times if hard linked
-L, –dereference
dereference all symbolic links
-S, –separate-dirs
do not include size of subdirectories
-s, –summarize
display only a total for each argument
-x, –one-file-system
skip directories on different filesystems
-X FILE, –exclude-from=FILE
Exclude files that match any pattern in FILE.
–exclude=PATTERN Exclude files that match PATTERN.
–max-depth=N
print the total for a directory (or file, with –all) only if it is N or fewer levels below the command line argument; –max-depth=0 is the same as –summarize
–help
display this help and exit
–version
output version information and exit

• Are you asking the database for data you do not need?
• Is MySQL examing too much data?(index solution)

2.Ways to restructure queries

• Complex queries Versus Many queries(few queries)
• Chopping up a query
• Join Decomposition(
  • When application joins may be more efficient
  • you cache and reuser a lot of data from earlier queries
  • you use multiple MyISAM tables
  • you distribute data across multiple severs
  • you replace joins with in() lists on larger tables
  • a  join refers to the same table multiple times
  • )

• Table locks
• No automated data recovery
• No transactions
• Only indexes are cached in memory
• Compact storage

2.The memory storage Engine

• Table locks
• No dynamic rows(no BLOB  and TEXT , even VARCHAR)
• Hash indexes are the default index type
• No index statistics
• Content is lost on restart

3.The InnoDB Storage Engine

• Transactional
• Foreign keys
• Row-level locks
• Multiversioning
• Clustering by primary key
• All indexes contain the primary key columns
• Optimized caching
• Unpached indexes
• Slow data load
• Blocking AUTO_INCREMENT
• No cached COUNT(*) value

Now i will list the point of different technology:

Maven: pom.xml  ——the configuration file of maven project , these are many concepts such as dependency,build , repositories;

Spring                       ——-listener rg.springframework.web.context.ContextLoaderListener,org.springframework.web.context.request.RequestContextListener

beans;

hibernate             ——ibernate-mapping

flex                        ——-use spring’s core

image1.jpg,image2.jpg,image10.jpg,image20.jpg,

after using function sort(),得到：

image1.jpg,image10.jpg,image2.jpg,image20.jpg,

this may be not what we want, so we can use natsort() to fix it .

But in the database if the field is varchar or text,how should we fix it ?

We can use this function :CAST.For example

select *  from  image  order by CAST(`image_order` AS SIGNED INT)

just to convert string to int, that is all. Anyway , if noticing it before , we can change  the type of image_order with SIGNED INT, that is better.

At first .Note that make the link with plugin class method.

$this->pi_getPageLink($pageId,”,$param).

Here $pageId is the Id of page ,$param is like this

$param    = array(‘tx_bookonline_pi1[cID]‘=>$cat_uid);

Then we just need change the configuration file  of realurl to let it know how to translate our parameter tx_bookonline_pi1[cID].

add this code

$TYPO3_CONF_VARS['EXTCONF']['realurl']['_DEFAULT']['postVarSets'] = array(

‘_DEFAULT’ => array (

‘category’ => array(
array(

‘GETvar’ => ‘tx_bookonline_pi1[cID]‘,
‘lookUpTable’ => array(

‘table’ => ‘tx_bookonline_category’,

‘id_field’ => ‘uid’,

‘alias_field’ => ‘name’,

‘addWhereClause’ => ‘ AND NOT deleted’

)

),

),

);

So realurl can work and translate the url to /category/name.Good luck!

As a cms , typo3 is complicated , at the same time , typo3 is excellent。Like a tool such as a computer , you can use computer to do more flexible work, but at the beginning , learning computer is not so easy as you thought，especially code program。From now on ， i will share my experience on typo3 with people who want to know typo3.Hope it is useful for you , my friend.