Memory error while running alignments
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Mihir • 0
@6fc2d61b
Last seen 10 weeks ago
United States

Hello I am getting this error while aligning sequences. I use Clusterize(), AlignSeq() and DistanceMatrix(). Clusterize works fine, but not the other two. There are about 50,000 sequences with range 50-200 base pairs each


Aligning Sequences:
================================================================================

Time difference of 17679.85 secs

============
 *** caught segfault ***
address 0x14ba5fc5c040, cause 'memory not mapped'

Traceback:
 1: DistanceMatrix(aligned_seqs, verbose = TRUE, processors = 1)
An irrecoverable exception occurred. R is aborting now ...
/var/spool/uge/e241/job_scripts/20856211: line 16: 4046314 Segmentation fault
DECIPHER Alignment • 158 views
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How much memory is available on the computer? A distance matrix of 50k sequences requires at least 50k50k/2 8 bytes = 10GB, assuming the output type = 'dist' in DistanceMatrix(). AlignSeqs() (depending on the parameterization) will need more memory than the distance matrix. Please provide example code if you would like more assistance.

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