MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 01/01/00 through 01/31/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 176,878 9,799,531
MED90 39,093 891,716
MED85 27,294 295,357
MED80 23,375 154,260
MED75 21,270 107,315
MED66 21,374 100,611
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 6,447 320,135
2-4 a.m. 2,958 163,749
4-6 a.m. 857 61,625
6-8 a.m. 3,664 186,152
8-10 a.m. 22,146 817,625
10-12 a.m. 53,253 1,895,665
12-2 p.m. 56,130 1,926,476
2-4 p.m. 65,319 2,279,303
4-6 p.m. 50,505 1,796,703
6-8 p.m. 22,980 911,401
8-10 p.m. 15,264 574,061
10-12 p.m. 9,761 415,895
__________ _____________ _________________
Total: 309,284 11,348,790
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,632
Davis 3,765
Irvine 485
Los Angeles 3,662
Riverside 368
San Diego 4,433
San Francisco 5,603
Santa Barbara 46
Santa Cruz 184
Lawrence Berkeley 158
Lawrence Livermore 229
Los Alamos 0
MELWEB 284,629
Other - UC 1,115
Other-Network UC 2,975
_____
309,284
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 19,556
Davis 45,390
Irvine 4,623
Los Angeles 35,525
Riverside 1,744
San Diego 33,591
San Francisco 60,332
Santa Barbara 3,301
Santa Cruz 1,046
Lawrence Berkeley 3,025
Lawrence Livermore 1,598
Los Alamos 0
MELWEB 11,095,463
Other - UC 3,615
Other-Network UC 39,981
_____
11,348,790
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.3
Standard deviation in seconds 4.5
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.3
Standard deviation in seconds 0.8
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:14
Average session length (minutes:seconds) 18:27
Longest session recorded (minutes:seconds) 306:47
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 415.7
Retrievals per search - standard deviation 5232.5
Percent of searches completed with 0 results 31.5%
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 309,284 12.4%
PRESENT 2,054,782 82.4%
INIT or CLOSE 128,932 5.2%
OTHER 1,527 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 19,516 4.4% 7,826 40.1% 4 848.0 7499.6
PERSONAL AUTHOR 94,146 21.0% 25,084 26.6% 7 71.7 551.1
TITLE WORD 30,313 6.8% 11,384 37.6% 3 231.0 3486.9
SUBSET 893 0.2% 246 27.5% 24 274.7 1187.7
SUBJECT WORD 2,188 0.5% 1,103 50.4% 10 478.1 3043.7
SUBJECT 9,852 2.2% 4,996 50.7% 20 749.6 4510.8
EXACT SUBJECT 20,855 4.7% 5,461 26.2% 30 526.5 3741.9
MAJOR SUBJECT 884 0.2% 343 38.8% 22 1487.9 13673.1
EXACT MAJOR SUBJ 2,189 0.5% 442 20.2% 24 468.4 7371.0
EXACT TITLE 2,558 0.6% 1,542 60.3% 1 69.7 998.1
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 5,197 1.2% 1,909 36.7% 211 1370.5 2882.0
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 59 0.0% 32 54.2% 8 55.6 122.4
KEYWORD 179663 40.1% 58,179 32.4% 19 813.5 7786.1
DATE 9,252 2.1% 2,137 23.1% 7 159.1 2976.0
LANGUAGE 27,840 6.2% 7,619 27.4% 27 399.7 2615.3
UNIQUE ID 1,083 0.2% 267 24.7% 1 1.0 0.4
ADDED 4,150 0.9% 2,905 70.0% 14 49.2 99.3
PUB TYPE 11,310 2.5% 2,853 25.2% 21 153.6 912.0
AUTHOR AFFIL. 3,140 0.7% 1,370 43.6% 9 143.0 2368.1
CHEMICAL NAME 42 0.0% 23 54.8% 10 431.6 971.4
EXACT CHEMICAL 33 0.0% 27 81.8% 7 8.8 7.9
AT 19,767 4.4% 5,716 28.9% 23 629.7 3408.1
AGE 1,031 0.2% 258 25.0% 22 152.4 512.9
ISN 2 0.0% 2 100% 0 0.0 0.0
ARTICLE 608 0.1% 141 23.2% 53 766.9 3071.3
XXS 792 0.2% 291 36.7% 18 750.2 3400.0
XMXS 534 0.1% 254 47.6% 14 300.2 1383.5
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 132 0.0% 64 48.5% 10 1394.4 4176.1
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 89,653 29.0% 30,139 33.6% 9 316.2 3028.3
Single 219,631 71.0% 67,415 30.7% 16 721.0 7199.8
PRESENT commands, by type:
MARC 34.6%
OPAC 30.3%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS