[Enhance] [Binlog] Reduce thread number of SyncJob to save resources#6418
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morningman merged 10 commits intoapache:masterfrom Sep 17, 2021
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[Enhance] [Binlog] Reduce thread number of SyncJob to save resources#6418morningman merged 10 commits intoapache:masterfrom
morningman merged 10 commits intoapache:masterfrom
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xy720
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morningman
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Aug 23, 2021
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| private static final ExecutorService executor = new StripedTaskExecutor(); | ||
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| public SyncTaskPool() { |
| /** | ||
| * max num of thread to handle sync task in sync task thread-pool. | ||
| */ | ||
| @ConfField public static int max_sync_task_threads_num = 1024; |
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Why need so many threads here?
morningman
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Aug 31, 2021
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Please add UT for SyncTaskPool
| // column names of source table | ||
| @SerializedName(value = "colNames") | ||
| private final List<String> colNames; | ||
| @SerializedName(value = "id") |
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use same name as variables
| SerialExecutor serialEx = slots[index]; | ||
| serialEx.execute(command); | ||
| } else { | ||
| taskPool.execute(command); |
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Do we need to accept task without index in this pool?
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It‘s for compatibility with general thread pools
| private static final Logger LOG = LogManager.getLogger(SyncTask.class); | ||
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| protected long signature; | ||
| protected int index; |
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Add comment to explain the index
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PR approved by at least one committer and no changes requested. |
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Proposed changes
#6417
This commit is going to reduce thread number of SyncJob .
1、Submit send task to thread pool to send data.
2、Submit eof task to thread pool to block and wake up client to commit transactions.
3、Use SerialExecutorService to ensure correct order of sent data in every channel.
Besides，some bugs have been fixed in this commit
1、Failed to resume syncJob.
2、Failed to do sync data when set multiple tables in a syncJob.
3、In a cluster with multiple Fe, master may hang up after creating syncJob.
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