Merge lp:~hrvojem/percona-xtradb-cluster/doc-loaddata-limit into lp:~percona-dev/percona-xtradb-cluster/5.5.20

[Hrvoje Matijakovic]

=== modified file 'doc/source/limitation.rst'
--- doc/source/limitation.rst	2012-02-04 01:22:23 +0000
+++ doc/source/limitation.rst	2012-04-04 14:20:39 +0000
@@ -14,7 +14,7 @@
 
  - Query log cannot be directed to table. If you enable query logging, you must forward the log to a file: log_output = FILE. Use general_log and general_log_file to choose query logging and the log file name.
 
- - Maximum allowed transaction size is defined by wsrep_max_ws_rows and wsrep_max_ws_size. Anything bigger (e.g. huge LOAD DATA) will be rejected.
+ - Maximum allowed transaction size is defined by wsrep_max_ws_rows and wsrep_max_ws_size. LOAD DATA INFILE processing will commit every 10K rows. So large transactions due to LOAD DATA will be split to series of small transactions.
 
  - Due to cluster level optimistic concurrency control, transaction issuing COMMIT may still be aborted at that stage. There can be two transactions writing to same rows and committing in separate XtraDB Cluster nodes, and only one of the them can successfully commit. The failing one will be aborted. For cluster level aborts, XtraDB Cluster gives back deadlock error code: 
    (Error: 1213 SQLSTATE: 40001  (ER_LOCK_DEADLOCK)).