MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 12/09/00 through 12/15/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 39,413 2,064,809
MED90 8,587 165,433
MED85 6,228 71,517
MED80 5,444 36,679
MED75 4,825 16,660
MED66 4,994 24,939
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,853 39,024
2-4 a.m. 681 9,334
4-6 a.m. 335 6,973
6-8 a.m. 1,082 29,788
8-10 a.m. 5,542 160,584
10-12 a.m. 12,321 411,848
12-2 p.m. 12,880 405,178
2-4 p.m. 13,875 525,500
4-6 p.m. 10,052 396,766
6-8 p.m. 5,556 199,467
8-10 p.m. 3,277 119,566
10-12 p.m. 2,037 76,009
__________ _____________ _________________
Total: 69,491 2,380,037
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 264
Davis 1,152
Irvine 73
Los Angeles 1,077
Riverside 32
San Diego 540
San Francisco 1,166
Santa Barbara 19
Santa Cruz 9
Lawrence Berkeley 17
Lawrence Livermore 84
Los Alamos 2
MELWEB 55,848
Searchlight 8,456
Other - UC 67
Other-Network UC 685
_____
69,491
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,541
Davis 9,525
Irvine 576
Los Angeles 11,154
Riverside 250
San Diego 4,077
San Francisco 11,543
Santa Barbara 185
Santa Cruz 81
Lawrence Berkeley 104
Lawrence Livermore 601
Los Alamos 689
MELWEB 2,317,346
Searchlight 5,511
Other - UC 231
Other-Network UC 15,623
_____
2,380,037
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
Standard deviation in seconds 3.2
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:19
Average session length (minutes:seconds) 19:15
Longest session recorded (minutes:seconds) 234:29
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 375.7
Retrievals per search - standard deviation 5040.5
Percent of searches completed with 0 results 34.5%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 69,491 13.2%
PRESENT 426,127 81.0%
INIT or CLOSE 29,983 5.7%
OTHER 621 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 4,380 4.6% 1,749 39.9% 4 679.6 3245.4
PERSONAL AUTHOR 22,143 23.2% 6,359 28.7% 8 101.3 986.2
TITLE WORD 7,828 8.2% 3,115 39.8% 3 146.1 1491.3
SUBSET 161 0.2% 32 19.9% 32 383.4 1650.8
SUBJECT WORD 272 0.3% 119 43.8% 12 262.4 1628.8
SUBJECT 1,988 2.1% 1,035 52.1% 17 472.6 2288.5
EXACT SUBJECT 3,308 3.5% 782 23.6% 38 405.5 1891.8
MAJOR SUBJECT 175 0.2% 74 42.3% 13 231.6 968.2
EXACT MAJOR SUBJ 379 0.4% 68 17.9% 31 313.6 843.7
EXACT TITLE 523 0.5% 303 57.9% 1 19.1 181.3
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 947 1.0% 270 28.5% 363 1573.5 3023.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 21 0.0% 10 47.6% 28 77.1 95.5
KEYWORD 39,857 41.8% 14,668 36.8% 16 811.3 8202.0
DATE 1,685 1.8% 453 26.9% 8 106.8 449.1
LANGUAGE 4,345 4.6% 1,162 26.7% 31 423.9 2395.7
UNIQUE ID 237 0.2% 44 18.6% 1 1.2 1.3
ADDED 1,011 1.1% 937 92.7% 2 5.1 11.0
PUB TYPE 2,257 2.4% 471 20.9% 22 146.1 761.5
AUTHOR AFFIL. 620 0.7% 253 40.8% 9 153.2 1718.4
CHEMICAL NAME 8 0.0% 1 12.5% 27 23.1 22.0
EXACT CHEMICAL 80 0.1% 51 63.7% 2 7.8 10.8
AT 2,721 2.9% 888 32.6% 23 473.2 2170.0
AGE 106 0.1% 17 16.0% 30 209.7 537.8
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 68 0.1% 11 16.2% 36 499.2 2216.2
XXS 165 0.2% 82 49.7% 11 161.6 628.8
XMXS 77 0.1% 34 44.2% 15 65.2 129.7
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 9 0.0% 9 100% 0 0.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 18,504 26.6% 6,723 36.3% 7 218.2 1726.8
Single 50,987 73.4% 17,239 33.8% 15 697.4 7145.8
PRESENT commands, by type:
MARC 31.5%
OPAC 28.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS