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(parent: 158e3bc) | patch
Cap wal_buffers to avoid a server crash when it's set very large.
authorRobert Haas <rhaas@postgresql.org>
Tue, 4 Aug 2015 16:58:54 +0000 (12:58 -0400)
committerRobert Haas <rhaas@postgresql.org>
Tue, 4 Aug 2015 16:58:54 +0000 (12:58 -0400)
commit369342cf70972a81e6be99b31593f31b73479d7f
treee922a4e24912550a38ba5c6a19bc8f507d5772b4tree | snapshot
parent158e3bc8e2507244b0d1e87ee334f39b7400098acommit | diff
Cap wal_buffers to avoid a server crash when it's set very large.

It must be possible to multiply wal_buffers by XLOG_BLCKSZ without
overflowing int, or calculations in StartupXLOG will go badly wrong
and crash the server.  Avoid that by imposing a maximum value on
wal_buffers.  This will be just under 2GB, assuming the usual value
for XLOG_BLCKSZ.

Josh Berkus, per an analysis by Andrew Gierth.
src/backend/utils/misc/guc.c diff | blob | history
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