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std_alloc memory leak

#erlang#memory
netDalek

netDalek

std_alloc memory leak

Hello. Does anybody have any ideas how to debug standard allocator memory leak. Standard allocator is used by a lot of different types of data, and I have no ideas how to find the real problem.

Now out production service leak for about 200MB every day.

> recon_alloc:memory(allocated_types).
[{binary_alloc,173309952},
 {driver_alloc,2392064},
 {eheap_alloc,256114688},
 {ets_alloc,155713536},
 {fix_alloc,7897088},
 {ll_alloc,35913728},
 {sl_alloc,294912},
 {std_alloc,1_883_799_552}, %1.8GB
 {temp_alloc,1179648}]
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netDalek

netDalek

After enabling memory instrumentations for std_alloc I’ve found this

> instrument:allocations(#{allocator_types => [std_alloc]}).
…
re_heap =>
{0,0,0,3118,31206,97417,63424,22618,5786,0,0,0,0,0,0,0,0,0},
…

Our service recompile thousand regexp from time to time and store in into ets, but each time it deletes old regexps, so no memory leak should be. Will try to research further

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