diff options
Diffstat (limited to 'src/backend/replication/logical/reorderbuffer.c')
| -rw-r--r-- | src/backend/replication/logical/reorderbuffer.c | 169 |
1 files changed, 145 insertions, 24 deletions
diff --git a/src/backend/replication/logical/reorderbuffer.c b/src/backend/replication/logical/reorderbuffer.c index fa9413fa2a0..e5fa1d62151 100644 --- a/src/backend/replication/logical/reorderbuffer.c +++ b/src/backend/replication/logical/reorderbuffer.c @@ -103,12 +103,24 @@ #include "storage/sinval.h" #include "utils/builtins.h" #include "utils/combocid.h" +#include "utils/inval.h" #include "utils/memdebug.h" #include "utils/memutils.h" #include "utils/rel.h" #include "utils/relfilenodemap.h" +/* + * Each transaction has an 8MB limit for invalidation messages distributed from + * other transactions. This limit is set considering scenarios with many + * concurrent logical decoding operations. When the distributed invalidation + * messages reach this threshold, the transaction is marked as + * RBTXN_DISTR_INVAL_OVERFLOWED to invalidate the complete cache as we have lost + * some inval messages and hence don't know what needs to be invalidated. + */ +#define MAX_DISTR_INVAL_MSG_PER_TXN \ + ((8 * 1024 * 1024) / sizeof(SharedInvalidationMessage)) + /* entry for a hash table we use to map from xid to our transaction state */ typedef struct ReorderBufferTXNByIdEnt { @@ -220,7 +232,8 @@ static void ReorderBufferIterTXNInit(ReorderBuffer *rb, ReorderBufferTXN *txn, static ReorderBufferChange *ReorderBufferIterTXNNext(ReorderBuffer *rb, ReorderBufferIterTXNState *state); static void ReorderBufferIterTXNFinish(ReorderBuffer *rb, ReorderBufferIterTXNState *state); -static void ReorderBufferExecuteInvalidations(ReorderBuffer *rb, ReorderBufferTXN *txn); +static void ReorderBufferExecuteInvalidations(uint32 nmsgs, + SharedInvalidationMessage *msgs); /* * --------------------------------------- @@ -406,6 +419,12 @@ ReorderBufferReturnTXN(ReorderBuffer *rb, ReorderBufferTXN *txn) txn->invalidations = NULL; } + if (txn->invalidations_distributed) + { + pfree(txn->invalidations_distributed); + txn->invalidations_distributed = NULL; + } + /* Reset the toast hash */ ReorderBufferToastReset(rb, txn); @@ -1883,7 +1902,8 @@ ReorderBufferCommit(ReorderBuffer *rb, TransactionId xid, * see new catalog contents, so execute all * invalidations. */ - ReorderBufferExecuteInvalidations(rb, txn); + ReorderBufferExecuteInvalidations(txn->ninvalidations, + txn->invalidations); } break; @@ -1921,7 +1941,17 @@ ReorderBufferCommit(ReorderBuffer *rb, TransactionId xid, AbortCurrentTransaction(); /* make sure there's no cache pollution */ - ReorderBufferExecuteInvalidations(rb, txn); + if (rbtxn_distr_inval_overflowed(txn)) + { + Assert(txn->ninvalidations_distributed == 0); + InvalidateSystemCaches(); + } + else + { + ReorderBufferExecuteInvalidations(txn->ninvalidations, txn->invalidations); + ReorderBufferExecuteInvalidations(txn->ninvalidations_distributed, + txn->invalidations_distributed); + } if (using_subtxn) RollbackAndReleaseCurrentSubTransaction(); @@ -1947,7 +1977,17 @@ ReorderBufferCommit(ReorderBuffer *rb, TransactionId xid, AbortCurrentTransaction(); /* make sure there's no cache pollution */ - ReorderBufferExecuteInvalidations(rb, txn); + if (rbtxn_distr_inval_overflowed(txn)) + { + Assert(txn->ninvalidations_distributed == 0); + InvalidateSystemCaches(); + } + else + { + ReorderBufferExecuteInvalidations(txn->ninvalidations, txn->invalidations); + ReorderBufferExecuteInvalidations(txn->ninvalidations_distributed, + txn->invalidations_distributed); + } if (using_subtxn) RollbackAndReleaseCurrentSubTransaction(); @@ -2060,9 +2100,10 @@ ReorderBufferForget(ReorderBuffer *rb, TransactionId xid, XLogRecPtr lsn) txn->final_lsn = lsn; /* - * Process cache invalidation messages if there are any. Even if we're not - * interested in the transaction's contents, it could have manipulated the - * catalog and we need to update the caches according to that. + * Process only cache invalidation messages in this transaction if there + * are any. Even if we're not interested in the transaction's contents, it + * could have manipulated the catalog and we need to update the caches + * according to that. */ if (txn->base_snapshot != NULL && txn->ninvalidations > 0) ReorderBufferImmediateInvalidation(rb, txn->ninvalidations, @@ -2254,6 +2295,36 @@ ReorderBufferAddNewTupleCids(ReorderBuffer *rb, TransactionId xid, } /* + * A helper function for ReorderBufferAddInvalidations() and + * ReorderBufferAddDistributedInvalidations() to accumulate the invalidation + * messages to the **invals_out. + */ +static void +ReorderBufferAccumulateInvalidations(SharedInvalidationMessage **invals_out, + uint32 *ninvals_out, + SharedInvalidationMessage *msgs_new, + Size nmsgs_new) +{ + if (*ninvals_out == 0) + { + *ninvals_out = nmsgs_new; + *invals_out = (SharedInvalidationMessage *) + palloc(sizeof(SharedInvalidationMessage) * nmsgs_new); + memcpy(*invals_out, msgs_new, sizeof(SharedInvalidationMessage) * nmsgs_new); + } + else + { + /* Enlarge the array of inval messages */ + *invals_out = (SharedInvalidationMessage *) + repalloc(*invals_out, sizeof(SharedInvalidationMessage) * + (*ninvals_out + nmsgs_new)); + memcpy(*invals_out + *ninvals_out, msgs_new, + nmsgs_new * sizeof(SharedInvalidationMessage)); + *ninvals_out += nmsgs_new; + } +} + +/* * Setup the invalidation of the toplevel transaction. * * This needs to be done before ReorderBufferCommit is called! @@ -2282,24 +2353,74 @@ ReorderBufferAddInvalidations(ReorderBuffer *rb, TransactionId xid, Assert(nmsgs > 0); - /* Accumulate invalidations. */ - if (txn->ninvalidations == 0) + ReorderBufferAccumulateInvalidations(&txn->invalidations, + &txn->ninvalidations, + msgs, nmsgs); + + MemoryContextSwitchTo(oldcontext); +} + + +/* + * Accumulate the invalidations distributed by other committed transactions + * for executing them later. + * + * This function is similar to ReorderBufferAddInvalidations() but stores + * the given inval messages to the txn->invalidations_distributed with the + * overflow check. + * + * This needs to be called by committed transactions to distribute their + * inval messages to in-progress transactions. + */ +void +ReorderBufferAddDistributedInvalidations(ReorderBuffer *rb, TransactionId xid, + XLogRecPtr lsn, Size nmsgs, + SharedInvalidationMessage *msgs) +{ + ReorderBufferTXN *txn; + MemoryContext oldcontext; + + txn = ReorderBufferTXNByXid(rb, xid, true, NULL, lsn, true); + + oldcontext = MemoryContextSwitchTo(rb->context); + + /* + * Collect all the invalidations under the top transaction, if available, + * so that we can execute them all together. + */ + if (txn->toplevel_xid) { - txn->ninvalidations = nmsgs; - txn->invalidations = (SharedInvalidationMessage *) - palloc(sizeof(SharedInvalidationMessage) * nmsgs); - memcpy(txn->invalidations, msgs, - sizeof(SharedInvalidationMessage) * nmsgs); + txn = ReorderBufferTXNByXid(rb, txn->toplevel_xid, true, NULL, lsn, + true); } - else + + Assert(nmsgs > 0); + + if (!rbtxn_distr_inval_overflowed(txn)) { - txn->invalidations = (SharedInvalidationMessage *) - repalloc(txn->invalidations, sizeof(SharedInvalidationMessage) * - (txn->ninvalidations + nmsgs)); + /* + * Check the transaction has enough space for storing distributed + * invalidation messages. + */ + if (txn->ninvalidations_distributed + nmsgs >= MAX_DISTR_INVAL_MSG_PER_TXN) + { + /* + * Mark the invalidation message as overflowed and free up the + * messages accumulated so far. + */ + txn->txn_flags |= RBTXN_DISTR_INVAL_OVERFLOWED; - memcpy(txn->invalidations + txn->ninvalidations, msgs, - nmsgs * sizeof(SharedInvalidationMessage)); - txn->ninvalidations += nmsgs; + if (txn->invalidations_distributed) + { + pfree(txn->invalidations_distributed); + txn->invalidations_distributed = NULL; + txn->ninvalidations_distributed = 0; + } + } + else + ReorderBufferAccumulateInvalidations(&txn->invalidations_distributed, + &txn->ninvalidations_distributed, + msgs, nmsgs); } MemoryContextSwitchTo(oldcontext); @@ -2310,12 +2431,12 @@ ReorderBufferAddInvalidations(ReorderBuffer *rb, TransactionId xid, * in the changestream but we don't know which those are. */ static void -ReorderBufferExecuteInvalidations(ReorderBuffer *rb, ReorderBufferTXN *txn) +ReorderBufferExecuteInvalidations(uint32 nmsgs, SharedInvalidationMessage *msgs) { int i; - for (i = 0; i < txn->ninvalidations; i++) - LocalExecuteInvalidationMessage(&txn->invalidations[i]); + for (i = 0; i < nmsgs; i++) + LocalExecuteInvalidationMessage(&msgs[i]); } /* |