"Ed L." <pgsql@xxxxxxxxxxxxx> writes: > We're seeing gobs of these via dmesg in PostgreSQL 8.3.3 on > ia64-unknown-linux-gnu, compiled by GCC gcc (GCC) 3.4.6 20060404 > (Red Hat 3.4.6-8), kernel 2.6.9-55.EL: > postmaster(13144): floating-point assist fault at ip > 40000000003a9382, isr 0000040000000008 See if you can trace that instruction pointer address to any specific part of the PG code (gdb will help, if the execute is built --enable-debug). PG isn't intentionally dealing in denormals, but I wonder if you've found an edge case in, say, the code to manage spread-out checkpoints. I believe that does do FP arithmetic, and it's in the bgwriter ... regards, tom lane