GraphQl Config (SchemaStiching) does not use LockGuardedCacheLoader (Expensive and large config)

[steven-hoffman-jomashop]

Preconditions and environment

Code on 2.4.8-beta1 shows no use of LockGuardedCacheLoader for GraphQl Config Data.

See GraphQl di.xml
For uses see:

• System.php
• AbstractBlock

This can lead to a 'stampede' type issue for the expensive schema stitching process. By using the LockGuardedCacheLoader, we can prevent this issue when the cache is flushed.

Other notes:

• LockGuardedCacheLoader should consider supporting different setting for allow_parallel_generation per usage.
• Most of the expensive parts of schema stitching can be done with di compile. (And the product/other fields merged in as currently done).

Steps to reproduce

• Clear cache (Or just remove zc:k:{id}_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA)
• Make 10x GraphQl requests at once / in quick succession.

Expected result

GraphQl schema stitching is only loaded once. (Or F times where F is some small fraction of N; this would mitigate against one process failing).

Actual result

GraphQl schema stitching is run once per request.

Additional information

You can see this effect by monitoring Redis

# Local test instance
$ redis-cli MONITOR | grep -i _MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA | cut -c -150
1734554861.066657 [0 10.0.2.2:63558] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "d"
1734554861.068282 [0 10.0.2.2:63562] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "d"
1734554861.082297 [0 10.0.2.2:63566] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "d"
1734554861.135661 [0 10.0.2.2:63572] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "d"
1734554861.141448 [0 10.0.2.2:63576] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "d"
1734554861.799215 [0 10.0.2.2:63580] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "d"
1734554862.930618 [0 10.0.2.2:63576] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "t"
1734554862.931542 [0 10.0.2.2:63558] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "t"
1734554862.931873 [0 10.0.2.2:63562] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "t"
1734554862.932389 [0 10.0.2.2:63572] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "t"
1734554862.932648 [0 10.0.2.2:63566] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "t"
1734554862.933038 [0 10.0.2.2:63580] "hget" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "t"
1734554862.955289 [0 10.0.2.2:63576] "hmset" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "d" "{\"Query\":{\"name\":\"Query\",\"ty
1734554862.968716 [0 10.0.2.2:63576] "sadd" "zc:ti:ABCD_CONFIG" "ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA"
1734554862.968721 [0 10.0.2.2:63576] "sadd" "zc:ti:ABCD_MAGE" "ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA"
1734554862.973511 [0 10.0.2.2:63566] "hmset" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "d" "{\"Query\":{\"name\":\"Query\",\"ty
1734554862.987830 [0 10.0.2.2:63566] "sadd" "zc:ti:ABCD_CONFIG" "ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA"
1734554862.987835 [0 10.0.2.2:63566] "sadd" "zc:ti:ABCD_MAGE" "ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA"
1734554862.993475 [0 10.0.2.2:63580] "hmset" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "d" "{\"Query\":{\"name\":\"Query\",\"ty
1734554863.007311 [0 10.0.2.2:63580] "sadd" "zc:ti:ABCD_CONFIG" "ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA"
1734554863.007315 [0 10.0.2.2:63580] "sadd" "zc:ti:ABCD_MAGE" "ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA"
1734554863.011244 [0 10.0.2.2:63572] "hmset" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "d" "{\"Query\":{\"name\":\"Query\",\"ty
1734554863.024044 [0 10.0.2.2:63572] "sadd" "zc:ti:ABCD_CONFIG" "ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA"
1734554863.024048 [0 10.0.2.2:63572] "sadd" "zc:ti:ABCD_MAGE" "ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA"
1734554863.024270 [0 10.0.2.2:63562] "hmset" "zc:k:ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA" "d" "{\"Query\":{\"name\":\"Query\",\"ty
1734554863.036918 [0 10.0.2.2:63562] "sadd" "zc:ti:ABCD_CONFIG" "ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA"
1734554863.036922 [0 10.0.2.2:63562] "sadd" "zc:ti:ABCD_MAGE" "ABCD_MAGENTO_FRAMEWORK_GRAPHQLSCHEMASTITCHING_CONFIG_DATA"

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

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