MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 09/09/00 through 09/15/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 42,785 2,273,721
MED90 8,797 185,174
MED85 5,853 81,641
MED80 5,052 36,517
MED75 4,544 18,725
MED66 4,568 28,755
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,103 45,700
2-4 a.m. 315 11,503
4-6 a.m. 220 11,623
6-8 a.m. 1,088 35,758
8-10 a.m. 5,321 193,343
10-12 a.m. 12,279 482,956
12-2 p.m. 12,712 464,998
2-4 p.m. 15,506 546,598
4-6 p.m. 12,545 441,414
6-8 p.m. 4,932 219,169
8-10 p.m. 2,748 109,945
10-12 p.m. 1,830 61,526
__________ _____________ _________________
Total: 71,599 2,624,533
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 289
Davis 745
Irvine 120
Los Angeles 747
Riverside 24
San Diego 997
San Francisco 2,462
Santa Barbara 70
Santa Cruz 9
Lawrence Berkeley 79
Lawrence Livermore 10
Los Alamos 3
MELWEB 57,870
Searchlight 7,622
Other - UC 75
Other-Network UC 477
_____
71,599
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,831
Davis 19,055
Irvine 2,259
Los Angeles 7,719
Riverside 138
San Diego 8,785
San Francisco 14,733
Santa Barbara 604
Santa Cruz 126
Lawrence Berkeley 358
Lawrence Livermore 371
Los Alamos 22
MELWEB 2,507,666
Searchlight 41,589
Other - UC 681
Other-Network UC 17,596
_____
2,624,533
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.8
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:34
Average session length (minutes:seconds) 19:52
Longest session recorded (minutes:seconds) 324:12
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 521.8
Retrievals per search - standard deviation 8089.5
Percent of searches completed with 0 results 30.9%
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 71,599 12.2%
PRESENT 483,682 82.6%
INIT or CLOSE 30,103 5.1%
OTHER 231 0.0%
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 5,239 5.1% 2,055 39.2% 4 647.3 2776.5
PERSONAL AUTHOR 22,630 21.8% 6,064 26.8% 7 82.4 987.2
TITLE WORD 8,722 8.4% 3,037 34.8% 2 109.3 1148.4
SUBSET 248 0.2% 82 33.1% 27 131.0 311.9
SUBJECT WORD 185 0.2% 93 50.3% 14 6708.3 52260.8
SUBJECT 1,827 1.8% 957 52.4% 14 546.6 3943.3
EXACT SUBJECT 4,461 4.3% 1,018 22.8% 28 577.0 5362.8
MAJOR SUBJECT 163 0.2% 68 41.7% 40 369.9 1018.3
EXACT MAJOR SUBJ 388 0.4% 95 24.5% 23 230.0 1042.2
EXACT TITLE 691 0.7% 391 56.6% 1 23.6 190.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,293 1.2% 537 41.5% 299 1761.0 3575.6
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 32 0.0% 19 59.4% 3 14.5 23.2
KEYWORD 40,666 39.2% 12,957 31.9% 17 1099.5 12504.3
DATE 2,167 2.1% 519 23.9% 5 113.9 1358.5
LANGUAGE 5,702 5.5% 1,436 25.2% 26 335.0 2825.8
UNIQUE ID 390 0.4% 47 12.1% 1 1.0 0.2
ADDED 1,216 1.2% 657 54.0% 5 13.9 23.5
PUB TYPE 2,750 2.7% 632 23.0% 23 115.4 402.8
AUTHOR AFFIL. 821 0.8% 385 46.9% 7 27.5 100.3
CHEMICAL NAME 9 0.0% 5 55.6% 37 151.0 254.4
EXACT CHEMICAL 3 0.0% 3 100% 0 0.0 0.0
AT 3,511 3.4% 1,133 32.3% 20 541.9 4055.9
AGE 218 0.2% 56 25.7% 15 132.9 410.7
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 131 0.1% 40 30.5% 20 172.3 303.5
XXS 129 0.1% 47 36.4% 20 1367.2 5442.6
XMXS 88 0.1% 34 38.6% 4 943.9 3926.0
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 11 0.0% 8 72.7% 1 377.7 652.4
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 21,292 29.7% 7,153 33.6% 7 231.4 2956.5
Single 50,307 70.3% 14,957 29.7% 15 964.3 11342.5
PRESENT commands, by type:
MARC 33.5%
OPAC 28.1%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS