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!896 修复walwrite线程占用CPU较高的问题

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Merge pull request !896 from movead/walwrite_high_cpu_issue
This commit is contained in:
opengauss-bot
2021-06-01 11:27:24 +08:00
committed by Gitee
parent a69ba0c7af dacfaa48f4
commit d024ba5450
2 changed files with 15 additions and 1 deletions
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15
src/gausskernel/process/threadpool/knl_instance.cpp
View File

@ -102,6 +102,20 @@ static void knl_g_ckpt_init(knl_g_ckpt_context* ckpt_cxt)
static void knl_g_wal_init(knl_g_wal_context *const wal_cxt)
{
int ret = 0;
ret = pthread_condattr_init(&wal_cxt->criticalEntryAtt);
if (ret != 0) {
elog(FATAL, "Fail to init conattr for walwrite");
}
ret = pthread_condattr_setclock(&wal_cxt->criticalEntryAtt, CLOCK_MONOTONIC);
if (ret != 0) {
elog(FATAL, "Fail to setclock walwrite");
}
ret = pthread_cond_init(&wal_cxt->criticalEntryCV, &wal_cxt->criticalEntryAtt);
if (ret != 0) {
elog(FATAL, "Fail to init cond for walwrite");
}
wal_cxt->walInsertStatusTable = NULL;
wal_cxt->walFlushWaitLock = NULL;
wal_cxt->walBufferInitWaitLock = NULL;
@ -114,7 +128,6 @@ static void knl_g_wal_init(knl_g_wal_context *const wal_cxt)
wal_cxt->XLogFlusherCPU = 0;
wal_cxt->isWalWriterSleeping = false;
wal_cxt->criticalEntryMutex = PTHREAD_MUTEX_INITIALIZER;
wal_cxt->criticalEntryCV = (pthread_cond_t)PTHREAD_COND_INITIALIZER;
wal_cxt->globalEndPosSegNo = InvalidXLogSegPtr;
wal_cxt->walWaitFlushCount = 0;
wal_cxt->lastWalStatusEntryFlushed = -1;

1
src/include/knl/knl_instance.h
View File

@ -698,6 +698,7 @@ typedef struct knl_g_wal_context {
volatile bool isWalWriterSleeping;
pthread_mutex_t criticalEntryMutex;
pthread_cond_t criticalEntryCV;
pthread_condattr_t criticalEntryAtt;
volatile uint32 walWaitFlushCount; /* only for xlog statistics use */
volatile XLogSegNo globalEndPosSegNo; /* Global variable for init xlog segment files. */
int lastWalStatusEntryFlushed;