info on strange error messages on postgresql

Hello,

I have these messages on my 7.4.7 database log...
TopMemoryContext: 87494704 total in 10676 blocks; 179400 free (61
chunks); 87315304 used
TopTransactionContext: 57344 total in 3 blocks; 648 free (5 chunks);
56696 used
DeferredTriggerXact: 0 total in 0 blocks; 0 free (0 chunks); 0 used
SPI Plan: 3072 total in 2 blocks; 64 free (0 chunks); 3008 used
SPI Plan: 3072 total in 2 blocks; 64 free (0 chunks); 3008 used
SPI Plan: 3072 total in 2 blocks; 64 free (0 chunks); 3008 used
SPI Plan: 3072 total in 2 blocks; 64 free (0 chunks); 3008 used
SPI Plan: 3072 total in 2 blocks; 64 free (0 chunks); 3008 used
SPI Plan: 3072 total in 2 blocks; 64 free (0 chunks); 3008 used
SPI Plan: 3072 total in 2 blocks; 64 free (0 chunks); 3008 used
MessageContext: 8192 total in 1 blocks; 7248 free (1 chunks); 944 used
PortalMemory: 8192 total in 1 blocks; 8040 free (0 chunks); 152 used
PortalHeapMemory: 3072 total in 2 blocks; 1136 free (13 chunks); 1936 used
CacheMemoryContext: 421519360 total in 60 blocks; 1116168 free (769
chunks); 420403192 used\\

followed by about 16GB of the following type of entries...
pg_temp_1486707494: 2048 total in 1 blocks; 768 free (0 chunks); 1280 used

First....are these 2 sets of messages related and second what would
cause either or both sets of messages to appear in the log?

Appreciate any help :)

-Joe