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https://issues.apache.org/jira/browse/ARROW-2879?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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chineking updated ARROW-2879:
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Summary: [Python]Arrow plasma can only use a small part of specified shared
memory (was: Arrow plasma can only use a small part of specified shared memory)
> [Python]Arrow plasma can only use a small part of specified shared memory
> -------------------------------------------------------------------------
>
> Key: ARROW-2879
> URL: https://issues.apache.org/jira/browse/ARROW-2879
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Reporter: chineking
> Priority: Major
>
> Hi, thanks for the great job of arrow, it helps us a lot.
> However, we encounter a problem when we were using plasma.
> The sample code:
> {code:python}
> import numpy as np
> import pyarrow as pa
> import pyarrow.plasma as plasma
> client = plasma.connect("/tmp/plasma", "", 0)
> puts = []
> nbytes = 0
> while True:
> a = np.ones((1000, 1000))
> try:
> oid = client.put(a)
> puts.append(client.get(oid))
> nbytes += a.nbytes
> except pa.lib.PlasmaStoreFull:
> print('use nbytes', nbytes)
> break
> {code}
> We start a plasma store with 1G memory, but the nbytes output above is only
> 496000000, which cannot even reach half of the memory we specified.
> I cannot figure out why plasma can only use such a small part of shared
> memory. Could anybody help me? Thanks a lot.
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