Question

I’m trying to use CHDB (hash table caching) for PHP (http://pecl.php.net/package/chdb).

I end up with this error:

Fatal error: Uncaught exception ‘Exception’ with message ‘Error
generating ‘d.chdb’: Cannot allocate memory’ in
/var/www/b/site/test.php:18 Stack trace: #0
/var/www/b/site/test.php(18): chdb_create(‘d.chdb’, Array) #1 {main}
thrown in /var/www/site/b/test.php on line 18

Does anyone know where this error comes from? Is it from the PHP framework itself or from somewhere else?

I manually installed CHDB in PHP on Fedora 11.

My code is very straightforward:

   $data = array('key1' => "val1");
   chdb_create("d.chdb", $data);

Any helpful tips welcome!

Answer 1

The programmer of chdb answered my question and the problem is that cmph library used by chdb does not allow hashing of arrays with size one. I used one entry just to test…

Simple as that :-).

Obviously the error message is a bit unclear.