Failed to set logmining server parameter MAX_SGA_SIZE to value XX

When you see something like this in your GoldenGate error log when you try to start an extract:

2017-04-12 14:51:38  ERROR   OGG-02039  Oracle GoldenGate Capture for Oracle, extxxx.prm:  Failed to set logmining server parameter MAX_SGA_SIZE to value 24.
2017-04-12 14:51:38  ERROR   OGG-02042  Oracle GoldenGate Capture for Oracle, extxxx.prm:  OCI Error 23605.
2017-04-12 14:51:38  ERROR   OGG-01668  Oracle GoldenGate Capture for Oracle, extxxx.prm:  PROCESS ABENDING.

… then you should increase the streams_pool_size (maybe you need to increase the sga parameters as well):

SQL> show parameter streams

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
streams_pool_size                    big integer 23M

Go at least to 1GB and you should be fine.