BUG#57275 binlog_cache_size affects trx- and stmt-cache and gets twice the expected memory

      
After the WL#2687, the binlog_cache_size and max_binlog_cache_size affect both the
stmt-cache and the trx-cache. This means that the resource used is twice the amount
expected/defined by the user.
      
The binlog_cache_use is incremented when the stmt-cache or the trx-cache is used
and binlog_cache_disk_use is incremented when the disk space from the stmt-cache or the
trx-cache is used. This behavior does not allow to distinguish which cache may be harming
performance due to the extra disk accesses and needs to have its in-memory cache
increased.
      
To fix the problem, we introduced two new options and status variables related to the
stmt-cache:
      
  Options:
      
    . binlog_stmt_cache_size
    . max_binlog_stmt_cache_size
      
    Status Variables:
      
    . binlog_stmt_cache_use
    . binlog_stmt_cache_disk_use

So there are

  . binlog_cache_size that defines the size of the transactional cache for
  updates to transactional engines for the binary log.

  . binlog_stmt_cache_size that defines the size of the statement cache for
  updates to non-transactional engines for the binary log.

  . max_binlog_cache_size that sets the total size of the transactional
  cache.

  . max_binlog_stmt_cache_size that sets the total size of the statement
  cache.

  . binlog_cache_use that identifies the number of transactions that used the
  temporary transactional binary log cache.

  . binlog_cache_disk_use that identifies the number of transactions that used
  the temporary transactional binary log cache but that exceeded the value of
  binlog_cache_size.

  . binlog_stmt_cache_use that identifies the number of statements that used the
  temporary non-transactional binary log cache.

  . binlog_stmt_cache_disk_use that identifies the number of statements that used
  the temporary non-transactional binary log cache but that exceeded the value of
  binlog_stmt_cache_size.

1 files changed, 2 insertions, 0 deletions

diff --git a/sql/share/errmsg-utf8.txt b/sql/share/errmsg-utf8.txt
index be97afe055a..b0dc4d9195b 100644
--- a/sql/share/errmsg-utf8.txt
+++ b/sql/share/errmsg-utf8.txt
@@ -6392,3 +6392,5 @@ ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE_MIN
 ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE_MAX
   eng "The requested value for the heartbeat period exceeds the value of `slave_net_timeout' seconds. A sensible value for the period should be less than the timeout."
 
+ER_STMT_CACHE_FULL  
+        eng "Multi-row statements required more than 'max_binlog_stmt_cache_size' bytes of storage; increase this mysqld variable and try again"