Magento命令模式重建索引Executing Magento Indexer From Shell

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n some situation when you want to re-index Magento catalog you will get an error message or reindex process will be broken. This problem is appearing when you have a lot of products in database and limited server resource. You can try to reindex from command line or shell.
In Magento there is folder with name “shell” in this folder you will find file with name “indexer.php” this is shell script for reindexing. You will ask yourself how to call this script, and take a look on my examples below and everything will be clear.

First of all you need to have access to linux commnad line or shell, and then go to your “MAGENTO_ROOT_FOLDER/shell“.

Our first example is how to get help from “indexer.php” script, you need to execute next comand
“php -f indexer.php help” and you will get response as in example below.

You can see that you can make reindexall but I don’t recommend that you execute full reindex in one step, beacuse you can cause MySql/Server overload. Reindexall calls 8 indexers in a row and process of reindexing can cause database LOCK on some database tables.

I recommend that you execute one by one indexer. You process will be faster and load of database will be smaller.

In Magento there are 8 indexers, you can get list of indexers if you call next command:
php -f indexer.php info

For example if you want to reindex “catalog_url” you need to execute next command:
php -f indexer.php — -reindex catalog_url, below is example

I recommend that you use indexer from shell because this process isn’t executing over web server/Apache and makes smaller impact on server resources  .

One note: I had problem with php memory limit, error message: “Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 88 bytes)“. I increased memory size to 128Mb, I added next statement on beginning of script:ini_set(‘memory_limit’, ’128M’); .
That’s all for now