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Do not checksum all bytes at once in plugin install #44649

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jasontedor
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@jasontedor jasontedor commented Jul 20, 2019

Today when checksumming a plugin zip during plugin install, we read all of the bytes of the zip into memory at once. When trying to run the plugin installer on a small heap (say, 64 MiB), this can lead to the plugin installer running out of memory when checksumming large plugins. This commit addresses this by reading the plugin bytes in 8 KiB chunks, thus using a constant amount of memory independent of the size of the plugin.

Relates #44545

Today when checksumming a plugin zip during plugin install, we read all
of the bytes of the zip into memory at once. When trying to run the
plugin installer on a small heap (say, 64 MB), this can lead to the
plugin installer running out of memory when checksumming large
plugins. This commit addresses this by reading the plugin bytes in 8 KiB
chunks, thus using a constant amount of memory independent of the size
of the plugin.
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Pinging @elastic/es-core-infra

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LGTM

@jasontedor jasontedor merged commit b33f384 into elastic:master Jul 20, 2019
jasontedor added a commit that referenced this pull request Jul 20, 2019
Today when checksumming a plugin zip during plugin install, we read all
of the bytes of the zip into memory at once. When trying to run the
plugin installer on a small heap (say, 64 MiB), this can lead to the
plugin installer running out of memory when checksumming large
plugins. This commit addresses this by reading the plugin bytes in 8 KiB
chunks, thus using a constant amount of memory independent of the size
of the plugin.
jasontedor added a commit that referenced this pull request Jul 20, 2019
Today when checksumming a plugin zip during plugin install, we read all
of the bytes of the zip into memory at once. When trying to run the
plugin installer on a small heap (say, 64 MiB), this can lead to the
plugin installer running out of memory when checksumming large
plugins. This commit addresses this by reading the plugin bytes in 8 KiB
chunks, thus using a constant amount of memory independent of the size
of the plugin.
jasontedor added a commit that referenced this pull request Jul 20, 2019
Today when checksumming a plugin zip during plugin install, we read all
of the bytes of the zip into memory at once. When trying to run the
plugin installer on a small heap (say, 64 MiB), this can lead to the
plugin installer running out of memory when checksumming large
plugins. This commit addresses this by reading the plugin bytes in 8 KiB
chunks, thus using a constant amount of memory independent of the size
of the plugin.
jasontedor added a commit that referenced this pull request Jul 20, 2019
Today when checksumming a plugin zip during plugin install, we read all
of the bytes of the zip into memory at once. When trying to run the
plugin installer on a small heap (say, 64 MiB), this can lead to the
plugin installer running out of memory when checksumming large
plugins. This commit addresses this by reading the plugin bytes in 8 KiB
chunks, thus using a constant amount of memory independent of the size
of the plugin.
@jasontedor jasontedor deleted the plugin-installer-checksum-all-bytes branch July 20, 2019 22:26
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4 participants