I did an strace -f on the command, and here's the end of the output (path edited out):

[pid 24623] stat("/path/65.db.psq", {st_mode=S_IFREG|0666, st_size=811
+5, ...}) = 0
[pid 24623] open("/path/65.db.psq", O_RDONLY) = 6
[pid 24623] mmap(NULL, 8115, PROT_READ, MAP_PRIVATE, 6, 0) = 0x7f78165
+73000
[pid 24623] write(1, "AT5G51490.1.CDS\tAT4G00190.1\t46.0"..., 1340) = 
+1340
[pid 24623] write(1, "AT2G26450.1.CDS\tAT1G53830.1\t40.5"..., 1615) = 
+1615
[pid 24623] write(1, "AT1G11580.1.CDS\tAT3G14310.1\t50.1"..., 1286) = 
+1286
[pid 24623] write(1, "AT2G45220.1.CDS\tAT4G00190.1\t52.6"..., 1279) = 
+1279
[pid 24623] write(1, "AT3G14310.1.CDS\tAT3G14310.1\t100."..., 1270) = 
+1270
[pid 24623] write(1, "AT5G55590.1.CDS\tAT5G55590.1\t100."..., 1452 <un
+finished ...>

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I guess this isn't a perl question, but it doesn't make sense to me that writing to a file would freeze.

In reply to Re^2: waitpid stalling on one particular file by seaver
in thread waitpid stalling on one particular file by seaver

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