Invalid command line arguments: 
 syntax: php reindex_solr.php [workspace_name] [reindexall|reindexmissing|optimizeindex|reindexone] [-skip {record_number}] [-reindextrunksize {trunk_size}] [-appuid {APP_UID}]
 Where 
       reindexall : reindex all the database. 
       reindexmissing: reindex only the missing records stored in database. 
                     (records defined in APP_SOLR_QUEUE table are required)
       optimizeindex: optimize the changes in the search index. (used to get faster results) 
 Optional Options: 
 -skip {record_number}: used to skip a number of records. 
 ex: -skip 10000 //skips the first 10000 records. 
 -reindextrunksize {trunk_size}: specify the number of records sent to index each time. 
 ex: -reindextrunksize 100 //(default = 1000) 
 Reduce the trunk if using big documents, and memory is not enough.