postgresqlのデッドロック時のログ

こんなログが吐かれますよと

ERROR:  deadlock detected
DETAIL:  Process 27840 waits for ShareLock on transaction 232876765; blocked by process 27808.
Process 27808 waits for ShareLock on transaction 232876479; blocked by process 27840.

postgres  4643  0.0  0.3  62376  3304 ?        S    Dec14   3:05 /usr/bin/postmaster -p 5432 -D /var/lib/pgsql/data
postgres  4645  0.0  0.0  11964   692 ?        S    Dec14   0:00  \_ postgres: logger process
postgres 13374  0.0  5.5  62564 49976 ?        S    Dec14   0:00  \_ postgres: writer process
postgres 13375  0.0  0.1  12964  1616 ?        S    Dec14   0:25  \_ postgres: stats buffer process
postgres 13376  0.0  0.0  12112   776 ?        S    Dec14   0:17  |   \_ postgres: stats collector process
postgres 27808  0.0  0.4  63056  3620 ?        S    13:04   0:00  \_ postgres: user db [local] idle in transaction


postgres 13375  0.0  0.1  12964  1616 ?        S    Dec14   0:25  \_ postgres: stats buffer process
postgres 13376  0.0  0.0  12112   776 ?        S    Dec14   0:17  |   \_ postgres: stats collector process
postgres 27808  0.0  0.4  63056  3620 ?        S    13:04   0:00  \_ postgres: user db [local] idle in transaction
postgres 28982  0.0  0.3  63056  3556 ?        S    13:08   0:00  \_ postgres: user db [local] UPDATE waiting